IMAX - you're supposed to feel like your in the movie with a big screen, quality sound, etc.
I don't think this theater is a real IMAX theater - the screen was not big or curved and the movie did not fill the whole screen. The sound quality was the same as a regular theater.
I've seen IMAX before and this wasn't it. Maybe some theaters are IMAX lite.
Avatar, IMAX 3D in Manchester, CT (near Buckland Mall)