Does anyone remember the other method they used to achieve 3D, where the glasses contained one lens which was slightly tinted? If I remember, the glasses were included in one of the TV mags prior to Children in Need or something, where they planned to show some specially shot scenes.
The idea being that the brain takes that little bit longer to process a dark image than a bright one. So whilst the same image is displayed to both eyes (from any standard TV), the right eye was taking longer to process and so was effectively seeing an 'old' image, or rather an image from a slightly different position in space from the left eye.
Granted the effect only worked if the camera was moving, and moving right to left across the scene but the specially shot sequences worked well, as did a lot of other standard programmes like the footy.
Surprised this hasn't been dug up for use more often.