I saw my first preview of I, Robot recently. Ugh. It's been a long time, but I remember the book being a somewhat low-key detective mystery with a sci-fi angle. The movie, however, looks like some whacked out version of Terminator: Rise of the Machines.
Yep, they turned it into an action flick.
Update: It has been pointed out to me that I was confusing I, Robot with Caves of Steel. Time to make a run to the bookstore.:)