This is the next step beyond HD. This requires you to use 2 video cameras (representing the left and right eye) simultaneously while recording your subject matter OR rendering a both a left and a right eye pass from your 3D software.

The camera offset is something that needs to be tested and tweaked. It's often best to do this in a lower resolution and use a low-cost technology like red-blue anaglyph glasses to see if you have your offset correct. There are several resources that can make an anaglyph out of your right and left eye images.

A free way to do it is to use GIMP and follow this anaglyph tutorial!

Keep in mind, HD is a harddrive hog, and stereo HD is doubly so!

You will obviously need 2 HD projectors or an HD monitor capable of doing 3D (there are none available now that I'm aware of) to display this kind of visualization.