Microsoft Applied Sciences Director Steven Bathiche shows off a highly evolved personal computer that enables users to gesture with their hands or wave around specially designed physical objects (such as a wand with an imprinted bar code) to manipulate content onscreen. In one example, he lights digital paper on fire while waving a wand around in real life. This evolution of Microsoft Surface works on a 3D plane instead of a flat 2D surface.
The "seeing display" uses an infrared camera behind a transparent OLED screen to capture movement. You can also scan text from a piece of paper by simply holding it up against the see-through screen. Check out a video of the seeing display performing some serious magic.