Inception. I don't know how it's been in other countries, but I suppose the massive hype it's been getting in Sweden is only a fraction of what you English-speaking people have had to deal with
Personally I only went to see it because I have an unhealthy crush on Ellen Page, but I definately came out pleasantly surprised. It's really intense, pretty complicated at times and, well, not the usual blockbuster material that hollywood likes to spoonfeed us with. Let's just say that the film took place in four different dimensions of the subconsciousness. Really cool, interesting and in some ways original film.
On the bad side,it wasn't one of Ellen's better roles, and her character was actually pretty dull. But still, definately worth checking out!