The value of 3d is not yet known. 3d film in 2009 is a different technology than the 3d films of the past (think linearly polarized vs circularly polarized). It is a new medium and should be treated as such. When the first films were released to the public the were nothing more than a novelty. People could not fathom the possibilites. And surely there will be progress in the language of 3d film just as there have been progressions in film language such as innovative editing techniques. There is alot to be learned and experiemnt with this new 3d technology.
Have you seen UP 3d? There are tons of people that would prefer watching it in 3d, as it is meant to be viewed, in the comfort of their own home. Sure $5000 bucks for the 3d tv alone is pretty steep, but what did HD tvs cost 5 years ago?