This is a very cool demo from this year's TED. Think mobile surface computing with features integrated into your environment. Very cool.
Pattie Maes Demos the Sixth Sense
This demo -- from Pattie Maes' lab at MIT, spearheaded by Pranav Mistry -- was the buzz of TED. It's a wearable device with a projector that paves the way for profound interaction with our environment. Imagine "Minority Report" and then some.