Douglas Adams, as usual, nailed it
Sigh. Another of these periodic attempts to map the "wow omg technology is so cooool" mindset of the !Bong¡ Startup Set into real life - and it will fail.
Douglas Adams characterized the biggest problem with gesture-based technology far, far better than I ever could:
"The machine was rather difficult to operate. For years radios had been operated by means of pressing buttons and turning dials; then as the technology became more sophisticated the controls were made touch-sensitive--you merely had to brush the panels with your fingers; now all you had to do was wave your hand in the general direction of the components and hope. It saved a lot of muscular expenditure, of course, but meant that you had to sit infuriatingly still if you wanted to keep listening to the same program. "