3D ended up becoming something of a hot item more or less because of things like Avatar. Everyone started thinking 3D was the new way to go, since it was becoming insanely popular for movies and such, but it's just dropped off now. In gaming, it has a different beast to slay. I ended up reading a bit of an article on 3D not too long ago (link here: http://www.usatoday.com/story/tech/2012/09/29/3d-tv-viewership-rate/1602741/) and, even just in the States, 3D TVs aren't that popular. They comprise a tiny segment of the population.
So you have 3D movies that are levelling off in monetary gain, 3D TV that doesn't really get people watching and 3D gaming without a lot of TVs in the population, it illustrates pretty well where it went.







