This is such a compelling demo because it's based on common technology available to millions of people. Doing it with Flash and a webcam was a stroke of genius.

This is such a compelling demo because it's based on common technology available to millions of people. Doing it with Flash and a webcam was a stroke of genius. When stuff is in a lab it's less compelling. I saw one of the Microsoft multi-touch tables recently. My first thought? "Oh, it's just a giant iPhone" Apple's made multi-touch everyday, that was the hard problem.