With the upcoming release of Microsoft Surface the term surface computing is getting really hot.
I just saw this demo from a NYU spinoff called Perceptive Pixel, they demonstrate their technology that pretty much resembles Microsoft Surface
Good resources about Surface Computing, i.e awesome demos ;-):
Go to the productsite for Microsoft Surface and take a look on the cool videos.
Perceptivepixel.com
Andy Wilsons webpage, the guy behind "Play Anywhere"
Rory at Channel9 goes crazy with Play Anywhere