I have already seen it in the BIG Cinemas with advanced 3D glasses. It's really amazing to see the titanic again in theaters and that too in 3D.
Titanic has already been watched many times and it is an amazing experience everytime you watch it. When I've watched 2D so many times I'll watch the 3D version also at least ones.
My wife made me go watch it with her and I felt like the 3D was forced. It wasn't as crisp as a movie shot in 3D