Forget multitouch; it's for grandmas and Luddites. The MIT Media Lab's new bi-directional (BIDI) display that reads your gestures? That's how we roll now.
The technology might seem similar to Project Natal, since it gives you control over objects on a display based on your movements. It differs, though, in that here an array of optical sensors are embedded behind the LCD, allowing for gestural motion tracking from close range.