It's kind of a neat thing, for sure, but what are we thinking are its practical applications? Possible use as an assistive device for the disabled, perhaps?
Is there any value in linking to 17 (or so) previous submissions going back some 14 months or so? Very little discussion, surprisingly few up-votes. It's a cute device, very clever, very surprising, nicely conceived, well executed.
Wouldn't mind playing with one, if only I had the time.