If they were able to put 3D commercials on TV during the 2009 Super Bowl, why cant they now?

During the 2009 Superbowl, they did 3D commercials for SoBe Life Water and Monsters Vs. Aliens, and the next night on NBC they aired a completely 3D episode of Chuck, and to see both all you needed was a pair of RealD 3D Gles, so why cant they just continue to do that, rather than making people buy completely new TVs?