The problem is that 3D TV wont be mainstream for 5-6 years, maybe even more.
For my part, when i get a 3D TV and the games look okey, it will be a bonus feature, but i aint buying a 3D TV just because of 3D gaming. im enjoying my 129" screen instead ;D
Also, the current gen 3D TVs arent any good. Also i usually have alot of friends over when i game, that means i need to have 5 pieces of 3D glasses. Also with 55" inch screen, you cant sit more then two in width without the 3d looking awfull.