I think there's some interesting work done around natural-user-interfaces (using a kinect to control software, etc). I think this is probably a more promising d

I think there's some interesting work done around natural-user-interfaces (using a kinect to control software, etc). I think this is probably a more promising direction than new custom hardware - because hardware is expensive, and quality hardware is far more so. I mean, if you could use a pen and paper to interface with a computer, you're standing on the shoulders of centuries of experience about how to produce a nice pen-paper experience, at a really cheap price. A newcomer in the world of interface hardware has to overcome the fact that everybody finds a new interface horrible for years, aside from the crazy technical and industrial challenges of producing something at a price/performance ratio that's better than entrenched technologies.