The Best Interfaces We Never Built
Five fictional interface concepts that could reshape how humans and machines interact.
Every piece of technology is an interface. Though the word has come to be a shorthand for what we see and use on a screen, an interface is anything that connects two or more things together. While that technically means that a piece of tape could be considered an interface between a picture and a wall, or a pipe between water and a home, interfaces become truly exciting when they create both a physical connection and a conceptual one — when they create a unique space for thinking, communicating, creating, or experiencing.
This is why, despite the flexibility and utility of multifunction devices like the smartphone, single-function computing devices still have the power to fascinate us all. The reason for this, I believe, is not just that single-function devices enable their users to fully focus on the experience they create, but because the device can be fully built for that experience. Every aspect of its physical interface can be customized to its functionality; it can have dedicated buttons, switches, knobs, and displays that directly connect our bodies to its features, rather than abstracting them through symbols under a pane of glass.
A perfect example of this comes from the very company responsible for steering our culture away from single-function devices; before the iPhone, Apple’s most influential product was the iPod, which won user’s over with an innovative approach to a physical interface: the clickwheel. It took the hand’s ability for fine motor control and coupled it for the need for speed in navigating a suddenly longer list of digital files. With a subtle but feel-good gesture, you could skip through thousands of files fluidly. It was seductive and encouraged us all to make full use of the newfound capacity the iPod provided. It was good for users and good for the .mp3 business. I may be overly nostalgic about this, but no feature of the iPhone feels as good to use as the clickwheel did.
Of course, that’s an example that sits right at the nexus between dedicated — old-fashioned — devices and the smartphonization of everything. Prior to the iPod, we had many single-focus devices and countless examples of physical interfaces that gave people unique ways of doing things. Whenever I use these kinds of devices — particularly physical media devices — I start to imagine alternate technological timelines. Ones where the iPhone didn’t determine two decades of interface consolidation. I go full sci-fi.
Science fiction, by the way, hasn’t just predicted our technological future. We all know the classic examples, particularly those from Star Trek: the communicator and tricorder anticipated the smartphone; the PADD anticipated the tablet; the ship’s computer anticipated Siri, Alexa, Google, and AI voice interfaces; the entire interior anticipated the Jony Ive glass filter on reality. It’s enough to make a case that Trek didn’t anticipate these things so much as those who watched it as young people matured in careers in design and engineering. But science fiction has also been a fertile ground for imagining very different ways for how humans and machines interact.
For me, the most compelling interface concepts from fiction are the ones that are built upon radically different approaches to human-computer interaction. Today, there’s a hunger to “get past” screen-based computer interaction, which I think is largely borne out of a preference for novelty and a desire for the riches that come from bringing an entirely new product category to market. With AI, the desire seems to be to redefine everything we’re used to using on a screen through a voice interface — something I think is a big mistake. And though I’ve written about the reasons why screens still make a lot of sense, what I want to focus on here are different interface paradigms that still make use of a physical connection between people and machine. I think we’ve just scratched the surface for the potential of physical interfaces.
Here are a few examples that come to mind that represent untried or untested ideas that captivate my imagination.
Multiple Dedicated Screens: 2001’s Discovery One
Our current computing convention is to focus on a single screen, which we then often divide among a variety of applications.
The computer workstations aboard the Discovery One in 2001: A Space Odyssey featured something we rarely see today: multiple, dedicated smaller screens. Each screen served a specific, stable purpose throughout a work session. A simple shift to physically isolating environments and distributing them makes it interesting as a choice to consider now, not just an arbitrary limitation defined by how large screens were at the time the film was produced.
Placing physical boundaries between screen-based environments rather than the soft, constantly shifting divisions we manage on our widescreen displays might seem cumbersome and unnecessary at first. But I wonder what half a century of computing that way would have created differently from what we ended up with thanks to the PC. Instead of spending time repositioning and reprioritizing windows — a task that has somehow become a significant part of modern computer use — dedicated displays would allow us to assign specific screens for ambient monitoring and others for focused work.
The psychological impact could be profound. Choosing which information deserves its own physical space creates a different relationship with that information. It becomes less about managing digital real estate and more about curating meaningful, persistent contexts for different types of thinking.
The Sonic Screwdriver: Intent as Interface
The Doctor’s sonic screwdriver from Doctor Who represents perhaps the most elegant interface concept ever imagined: a universal tool that somehow interfaces with any technology through harmonic resonance. But the really interesting aspect isn’t the pseudo-scientific explanation — it’s how the device responds to intent rather than requiring learned commands or specific inputs.
The sonic screwdriver suggests technology that adapts to human purpose rather than forcing humans to adapt to machine constraints. Instead of memorizing syntax, keyboard shortcuts, or navigation hierarchies, the user simply needs to clearly understand what they want to accomplish. The interface becomes transparent, disappearing entirely in favor of direct intention-to-result interaction.
This points toward computing that works more like natural tool use — the way a craftsperson uses a hammer or chisel — where the tool extends human capability without requiring conscious attention to the tool itself. The Doctor’s screwdriver may, at this point, be indistinguishable from magic, but in a future with increased miniaturization, nanotech, and quantum computing, a personal device shaped by intent could be possible.
Al’s Handlink: The Mind-Object
In Quantum Leap, Al’s handlink device looks like a smartphone-sized Mondrian painting: no screen, no discernible buttons, just blocky areas of color that illuminate as he uses it. As the show progressed, the device became increasingly abstract until it seemed impossible that any human could actually operate it.
But perhaps that’s the point. The handlink might represent a complete paradigm shift toward iconic and symbolic visual computing, or it could be something even more radical: a mind-object, a projection within a projection coming entirely from Al’s consciousness. A totem that’s entirely imaginary yet functionally real. In the context of the show, that was an explanation that made sense to me — Al, after all, wasn’t physically there with his time-leaping friend Sam, he was a holographic projection from a stable time in the future. He could have looked like anything; so, too, his computer.
But that handlink as a mind-object also suggests computing that exists at the intersection of technology and parapsychology — interfaces that respond to mental states, emotions, or subconscious patterns rather than explicit physical inputs. What kind of computing would exist in a world where telepathy was as commonly experienced as the five senses?
Penny’s Multi-Page Computer: Hardware That Adapts
Inspector Gadget’s niece Penny carried a computer disguised as a book, anticipating today’s foldable devices. But unlike our current two-screen foldables arranged in codex format, Penny’s book had multiple pages, each providing a unique interface tailored to specific tasks.
This represents customization at both the software and hardware layers simultaneously. Rather than software conforming to hardware constraints, the physical device itself adapts to the needs of different applications. Each page could offer different input methods, display characteristics, or interaction paradigms optimized for specific types of work.
This could be achieved similarly to the Doctor’s screwdriver, but it also could be more within reach if we imagine this kind of layered interface as composed of individual modules. Google’s Project Ara was an inspiring foray into modular computing that, I believe, still has promise today, if not moreso thanks to 3D printing. What if you could print your own interface?
The Holodeck as Thinking Interface
Star Trek’s Holodeck is usually discussed as virtual reality entertainment, but some episodes showed it functioning as a thinking interface — a tool for conceptual exploration rather than just immersive experience.
When Data’s artificial offspring used the Holodeck to visualize possible physical appearances while exploring identity, it functioned much like we use Midjourney today: prompting a machine with descriptions to produce images representing something we’ve already begun to visualize mentally. In another episode, when crew members used it to reconstruct a shared suppressed memory, it became a collaborative medium for group introspection and collective problem-solving.
In both cases, the interface disappeared entirely. There was no “using” or “inhabiting” the Holodeck in any traditional sense — it became a transparent extension of human thought processes, whether individual identity exploration or collective memory recovery.
Beyond the Screen, but Not the Body
Each of these examples suggests moving past our current obsession with maximizing screen real estate and window management. They point toward interfaces that work more like natural human activities: environmental awareness, tool use, conversation, and collaborative thinking.
The best interfaces we never built aren’t just sleeker screens — they’re fundamentally different approaches to creating that unique space for thinking, communicating, creating, and experiencing that makes technology truly exciting. We’ve spent two decades consolidating everything into glass rectangles. Perhaps it’s time to build something different.
Written by Christopher Butler on
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