In many depictions of computer usage in science fiction, people are seen typing away on holographic keyboards suspended in midair. Like many other sci-fi concepts, this particular method of human-computer interfacing has inspired real-life attempts. Unfortunately, the reality of the situation is that light-based peripherals simply aren’t as reliable as physical buttons, as evidenced by the Gangxun Laser Projection keyboard, as well as just about every projection keyboard like it.
Rather than a physical keyboard, this Bluetooth-connected device projects an image of a keyboard onto a solid surface like a desk. The device then detects when its projection is being obscured by you typing on the surface and registers it as keystrokes. It definitely looks cool and makes a good talking point, but that’s about it.
Not only is trying to type without actual keys rather uncomfortable, but the accuracy of the device also tends to be rather spotty and slow, reading your strokes wrong and taking longer than usual to receive them. The device also only works properly in a sufficiently darkened room where the keyboard can fully project. Unless you’re a cave-dwelling gremlin, you’re probably not spending all of your time in a pitch-black office, which means the device will barely project, and therefore barely parse your keystrokes.
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