3D movies are ok. I think it should just be kept as a novelty with only a few movies released in 3D. I hate that almost every movie that comes out lately is in both the 3D and 2D versions. Plus paying the up charge just for the novelty sucks. You're really only paying for the glasses. I think there should be a discount for those who keep the glasses and reuse them.
As for the movies themselves, it's annoying wearing the glasses and you don't have an option of taking them off unless you want to watch a blurry movie for 2 hours.
3D is not intended for all types of movies. I really don't like the whole idea of 3D because it can only be seen at the theaters. And you are correct, after awhile everything does seem blurry.