Nathan Linder, a MIT student, turned a lamp, pico projector, webcam, and computer into a full blown robotic personal assistant that will change the way you view your desk lamp. The LuminAR robotic lamp "sees" what you're doing through its webcam and augments your actions accordingly. It displays information, like web pages, videos, and more, through its pico projector and can even read and recognize user gestures and input. The idea, according to Linder, is to "transform surfaces and objects into interactive spaces that blend digital media and information with the physical space".
It also solves one of the problems with Microsoft Surface-like touchscreens: Since the image is projected from above instead of from below you won't cover the image with your hand when you interact with it, it simply projects onto the back of your hand instead.