I need to comment on eliseus’ statement about Avatar: They did NOT use the red-blue glasses (which is called anaglyph). They used polarized glasses for the Imax screens and “Real-D” for other 3-D screens (a similar technologly known as “circular polarization”). Both technologies are VASTLY superior to anaglyph. All of the 3-D movies in theaters these days use one of 3 systems for 3-D: 1) Disney uses “Disney Digital 3-D”, which is a “circular-polarization” system. 2) Non-Disney movies use “Real-D” which is essentially the same thing (it might be exactly the same thing, not sure). Last, but not least, is the Imax 3-D, which is an older version of polarization (but still similar to the other two). Some Imax screens also used the shutter glasses (field-sequential), but I doubt if that is true anymore. The only place you will see anaglyph (red-blue or red-green) is on TV and some 3-D DVD’s. The second-generation shutter system is the standard for 3-D TV, and is already in use on certain Samsung and Mitsubishi TV’s.