Word leaked today about a yet to be announced add on for Sony's PS3. 

It appears that Sony and Prime Sense are working together to develop a real time 3D positional feature like in Minority Report which allows for manipulation of objects/data in 3D.

Taken from Prime Sense's website:

"Prime Sense’s concept is a device, which allows a computer to perceive the world in 3D and derive an understanding of the world based on sight, just the way humans do.

The device includes a sensor, which sees a user (including their complete surroundings), and a digital component, or "brain" which learns and understands user movement within those surroundings.

Prime Sense’s interactive device can see, track and react to user movements outside the computer, all without change of environment or wearable equipment for the end user. The closed device is plug and play and platform independent. "

Thanks to MegaGames for the scoop here.