I was flicking through Empire magazine last night and they had a guide to the 101 movies you must see in 2010. One of the films that jumped out at me was The Tree of Life. It's written and directed by Terrence Malick (The Thin Red Line) and stars Brad Pitt and Sean Penn. If weight of talent is anything to go by it should be pretty good. There's no trailer yet but here's the IMDB link:

http://www.imdb.com/title/tt0478304/