Read this today:

Quote:Humans use at least 5 tricks to determine the three-dimensional makeup of a scene:
1. Focal depth: based on how much the eye's lens has to focus
2. Convergence: based on the slight differences in pointing of the two eyes to a target
3. Stereopsis (static parallax): based on the slight differences between the left and right eye images
4. Motion parallax: based on the different displacements/motions of objects at different distances (e.g. as you move your head)
5. Visual inference: reconstructing using cues like occlusion, lighting, etc.

In essence, 2D gives #5.
Current 3D gives #3 (giving each eye a different image).
Stuff like the head tracking mechanism for the Wii developed by some guy a few years back gives #4.

But because wee can't do #1 or #2, wee'll be getting headaches regardless of the implementation.