Funny you should ask, I spent about an hour in front of that particular model when I was stuck at Best Buy for a few hours.
The golf tourney was on, so I didn't get to see how faster-paced video looked on it, but I have to say it looks great. The guy working there told me that the backlights run basically all the way to the edge of the screen, so that's a plus in terms of vibrance. The picture and color were extremely good. They had the 40" next to like a 52" or something and the brightness was like day and night with the bigger model looking washed out.
I'm sure you know, but these LED TVs are incredibly thin. I'd say an inch at the very most from front to back. Very sleek. I can't wait for more of these to come out so prices drop