People who cite history as a reason 3D TV won't take off are ignoring, for one thing, how cheap it is to add 3D to new HDTVs. Never before in history has there been such a confluence of elements for 3D's success - all because of how cheap it is to change and add to our digital standards, while maintaining a remarkable degree of compatibility with what we already have. Take, for instance, the fact that 3D discs will play back in 2D in older Blu-ray players. How great is that? No need for double inventories on the shelves. One size fits all. Not that there aren't likely to be some glitches here and there, but it showed remarkable foresight to be able to introduce MVC encoded discs without "breaking" their 2D playback on older players. People who see a conspiracy in this move to 3D are demonstrating their ignorance of the natural (if surprisingly rapid) growth of digital technology. Credit also a few visionary people in the movie industry for accelerating the growth of 3D even more - Jeffrey Katzenberg and James Cameron.
As Lee says, once the price of the glasses goes down, there will be little impediment to 3D steamrolling ahead.