Four companies are fighting for bridge of the nose with three different technologies for 3-D glasses. All work on the same general principle: each eye sees a slightly different frame of the movie, but the brain puts them together and perceives depth.
Each company claims its glasses and projection-system technology is better. Because glasses using one technology are useless in a theater using a different digital projection system, the companies backing the three technologies are scrambling for the upper hand while the 3-D industry is still in its infancy.
Exhibitors are convinced that 3-D, while seeming like a gimmick now, will lure movie lovers away from their crisp high-definition widescreen TVs at home and back to the theater.
Full story from the New York Times