Each week Ross Rubin contributes Switched On, a column about consumer technology. In the unmarked office of 3-D Vision, Inc., you can see a television or PC display a videogame or movie with a convincing stereoscopic effect. That might not seem very unique. However, the television is a CRT from the 1990s, the video game is Super Mario for the Nintendo 64 and the movie is The Wizard of Oz, made in 1939. Despite the growth in 3D telev