I saw Cloudy with A Chance of Meatballs in 3D at the theater. It was fun.
I saw it at home on Blu-ray in 2D. It was equally fun.
If 3D can get some standards going along with sufficient content it may last a while as a niche or semi-niche product. But as said already, you'll be asking people to buy new equipment (TV, player, discs, glasses), and many aren't going to do that. Then, there's the folks who can't watch 3D because it makes them sick or they can't perceive the effect as well, though that's only 4-6% from what I remember.
VPI, Grado, SME, Pioneer Elite, Magnum Dynalab, Oppo, DVDO, McIntosh, JJ, Mirage, Kimber, Transparent, MIT, Pangea, Wireworld, Shunyata, PS Audio, Furman, Sanus