Its not that its a slow year. Its that the better movies aren't mainstream this year. I would say about 3 out of 4 movies that are mainstream are below average.
One of my picks for this year is In Bruges. An European film about crime, comedy and drama. It all takes place in Bruges, Belgium which a small, preserved medieval town. Two assassins take a trip there to lay low after a job gone kind of wrong. Well the Irish guy complains about how crappy Bruges is while the British guy enjoys the sightseeing. I won't go further into the story but it everything in this movie was on point. The mix of comedy and drama was so perfect you don't even notice the time fly by. Also, the comedy is centered around stereotypes so if your sensitive to that stuff or swearing then don't bother.