Saw it. My take? It's the Stephen King version of an Asimov story. IE, it takes Asimov's vision and twists it into something dark. This wasn't necessarily bad, since I really never agreed with Asimov's vision either. (If you've read the entire series, you know that Asimov comes up with something remarkably similar to the elements at the end of this movie as the finale for the robot books.)
It made me wonder if it was based somewhat on that concept too, but they didn't license any of the books beyond I, Robot (I think). Since it was grafting the Asimov universe onto a pre-existing script, they must have just come up with that on their own. In which case, I think they did a pretty good job of it.
I wouldn't say Stephen King though. And I wouldn't call the movie dark. It just wasn't..........dark enough to be called dark. It's just an action movie. With some funny lines. And some very cool robot fighting. Fighting robots! Come on, how could you not see a movie with fighting robots. I mean, they fight, and it's cool! So...
Asimov is probably rolling in his grave. Though actually one time (he says in his autobiography) he had a dream that he died and went to heaven, and said "but I'm an atheist," and they said "that's okay, you're not the one who decides who gets to heaven," and he couldn't disagree with that, but after a few more minutes he started looking around for a typewriter. So that is to say that Asimov is probably up there somewhere typing away...