I think 3-D tech has hit the point where it's no longer a passing fad. Avatar's use of 3-D made me a believer. But, at the same time, Hollywood is definately in the process of overdoing it. Currently the only good way to get people into the theater is through the 3-D, which becomes a gimmick as many movies probably won't gain much from the tech.
We're getting into an ugly cycle where studios will want to add 3-D to get people into the seats and charge more money. 3-D flicks cost more to make, so now the studios will pressure productions to be 'safer' all ages sequels ensuring bigger box-office. Directors and producers will have much less control due to the huge studio investements, so we could all be looking forward to years of bland sequels and licensed properties.
3-D in the home will also be pushed heavily as ESPN and Discovery are already working on 3-D channels. It might not be bad for a movie or two, but really how many people want to sit down in thier home and strap on a set of goggles with the friends an family everytime they want to watch TV. And if you don't have a straight on view of the TV, it won't work properly. But, the electronics manufacturers will push the tech hard as it means more money upgrading home theater systems. I still think Blu-Ray is overkill for most people, but the manufacturers are pushing it like everyone needs it. I know a lot of people running Blu-Ray through small HD systems with stereo sound. Trust me, they're getting no advantage over an upscaled DVD at that point. But they're certain the picture is so much better
So in the end, yes 3-D coupled with IMAX is potentially game changing for movie theaters and attendance given the right movie MADE for the tech. But Hollywood and home electronics manuf. will probably just turn it into another gimmick to push sales.
My most anticipated 3-D flick has to be TRON Legacy ... if there was ever a movie that screamed for digital 3-D, that would be it