TED: Portable "Minority Report" interface!

For those of you haven't seen Minority Report, the movie showcases some seemingly futuristic gestural interfaces that Tom Cruise uses to control a complex computer system. Yet only a few years after it came out, we're already seeing just how possible this is. In this TED video, Pattie Maes from MIT demonstrates a low-cost ($350) system that lets the user use any available surface (a wall, a free hand (!)) as a multi-touch interface. Granted, it's a bit slower to use than Jeff Han's table or Microsoft's Surface, but hey, it's cheap and you can bring it with you.