Glasses will be expensive at first if you want good ones, but over time, as it becomes more and more mainstream, the cost will get lower.
As far as gaming goes, most people play games in solo, so there's nothing wrong there. It won't be expensive for gaming (you only need one pair of glasses).
Hollywood has been interested in this tech for quite some time and the next step is to take the tech in consumers' homes. I don't see how there's anything wrong with that. It's the logical step.
Like someone else said, At first we had 24" or smaller TV sets. We can now have 100" + screens in our living room. Audio was mono, then stereo, then surround... Now you can have better sound at home than in most theaters with 7.1 or more channels with HD sound. We've had 3D movies for quite some time now, and the tech has evolved greatly over the years. We'll get to have it all in the comfort of our living room. It's the logical step.
Just like not everyone will want or care to have a HD projector with a 100" + screen and a sound system with incredible sound fidelity in their living room, many people still want that kind of thing. You may not be one of them, but to dismiss the tech as an automatic failure is rather short-sighted. ¬_¬