So there's a number of glasses-free 3D display solutions available, but these work by projecting different images into each eye.
This is something rather different:

Quote:As striking as it is, the illusion of depth now routinely offered by 3-D movies is a paltry facsimile of a true three-dimensional visual experience. In the real world, as you move around an object, your perspective on it changes. But in a movie theater showing a 3-D movie, everyone in the audience has the same, fixed perspective — and has to wear cumbersome glasses, to boot.

Despite impressive recent advances, holographic television, which would present images that vary with varying perspectives, probably remains some distance in the future. But in a new paper featured as a research highlight at this summer’s Siggraph computer-graphics conference, the MIT Media Lab’s Camera Culture group offers a new approach to multiple-perspective, glasses-free 3-D that could prove much more practical in the short term.

Source: http://web.mit.edu/newsoffice/2012/glass...-0712.html

Check out the above source for a video which demonstrates how it all works.