One of the biggest parts of this is the display. It runs using four projectors, a head-tracking camera, and some shutter glasses. The projectors project onto a four sided box of glass covered in rear-projection film. Using the camera and some markers on the glasses, the computer gets the position of your head and can then adjust what it shows to make it look 3d. Here is a video with a good example of how it works: http://www.youtube.com/watch?feature=player_embedded&v=2CbiOikirrg
The shutter glasses would be used with the projectors, which are 120hz, to show a different image to each eye making the illusion even stronger, or to allow two people to share the workspace.