Please don't give him any ideas: we've already had way too many problems caused by people who incorporated arm-waving into financial analysis....
It's a neat concept, but the video doesn't give a sense that there's any sort of system translating movements or positions into what the computer reports as its input (well, except when he touched his chest and it said "mammaries"): very similar-looking gestures could produce either "3", or "742", or "ghost". Probably just because we've been given a peek at something still in the very early stages.
It'll be interesting to see what it does as it evolves.
Ran