3D does seem to be the movie industry's ginger-haired stepson at the moment.
I'll go out on a limb and say, I like it, with the caveat of "when it's done well." The movies that start life as 2D and get converted in post-production invariably look crap, but the ones that have been designed and filmed that way are usually pretty good.
It might be a ploy to get bums on seats in the cinema, but for me at least it's working, and let's be honest it needed a shot in the arm. I've felt for years now that there's little point in going with a group to the cinema in order to ignore each other for two hours, when I can wait a couple of months and then rest the DVD for less than the cost of a single cinema ticket, and have a much more social experience. Now though, I'll happily pay twice the price to go and watch a 3D IMAX blockbuster in the posh seats. It's put the magic back into the cinema again, something that has been missing for years.
I think home 3D is fundamentally flawed though, as people watch TV in a different way. People sit still in cinemas (hopefully) and watch the film; at home in front of the TV it's less of an all-consuming activity, they'll move around move, go for snacks and suchlike. 3D glasses are fine in a cinema environment, but doomed at home. When we get glasses-free technology perfected is when it'll finally take off.
I've no doubt that it's the future. It'll take a while yet, but at some point we're going to look back on 2D viewing like we view black and white now.