It will probably go down as my favorite movie of the year. I'm not aware of anything else coming out that will be able to top it. It's a weird, kookie, action packed and fun sci-fi adventure.
I imagine that the Matrix would have been a lot like this movie, if it was funny.
I also really liked this movie. I had never heard of it but it was crappy weather and my partner and I decided to go to see a movie and saw it by accident and it was really fun and interesting. Gets a little heavy handed with the message at times but still an enjoyable movie.
spoiler
I think the whole movie is AI driven fantasy starting with when the main character as a child finds and puts on a mask outside his home that he finds in the snow.