The other day I saw a demonstration of a technique to make 3D images without glasses. The advantage extends even further, though: not only do you not need glasses, but you don't need a special monitor/TV either. So right away I wondered whether this technique of wiggling the images back and forth could be applied to movies too.
My guess is that it wouldn't work too well at the 120ms speed demonstrated in the linked page, but maybe there's another option. Your eyes make these little movements called saccades, which are an integral part of vision. Perhaps, I think to myself, wiggling moving pictures as fast as saccades could fool our brains into seeing depth in a flat image, whether it's still or a movie. If that were the case, we wouldn't need to wear glasses for 3D movies, nor would we need to replace all our LCD and plasma TVs for 3D-capable models. We wouldn't even need special 3D Blu-Ray specifications, unless the frame rate needs to be much higher for saccade-3D.
Mokalus of Borg
PS - Keep in mind that I am, in every way possible, not a neuroscientist.
PPS - So this may be complete nonsense. Also, saccades are very fast.