I'll have some of what you guys are smoking.

1) Current 3D games are composed of 3D environments with freedom of movement in the x,y,z planes, but we view them on a 2D screen. Has anyone else caught themselves leaning to the left to try to see around a corner on screen?
2) Old 3D games (Wolfenstein) were composed of flat maps with scaling and perspective. The environments weren't quite 3D either, as movement was limited in the z plane - the x,y plane could be shifted up or down, but no two objects could share the same x,y coordinates regardless of z location.
3) Televisions screens are not 3D, nor are stereoscopic images. No matter how much you move, the image looks the same.
4) The view out a window is 3D. When you move, the view changes as your relationship to outside objects changes.
In short, there are 3D environments (either real or digital) and we view them on screen as a series of 2D images.