I only heard of this movie this week, and it's coming out in just a few days. It appears to be anime, but it's based upon Mary Norton's book The Borrowers, which I remember loving as a child.
Will you see this? Have you been interested in any of the other Disney forays (partnerships?) with makers of anime-style productions? I don't know a lot about the genre, so forgive me if I sound ignorant about it
http://www.diszine.com/content/official-trailer-for-the-secret-world-of-arrietty-now-available