Microsoft Milan site http://www.microsoft.com/surface/
Really cool stuff from Microsoft. The video is very impressive. I saw the beginnings of this back in the day. There are a couple of cool older projects which remind me of much of the stuff that I see in the video:
MIT Media Lab AudioPad http://youtube.com/watch?v=lxAD1QIv_dw
Enjoy these cool new pieces of technology.