Nice cars indeed; and you'd probably be very happy to own such vehicles, if you are the rich and sleazy bastard who can afford such unnecessary luxury.Forza Motorsport 3 is going to be in stores for the Xbox 360 on October 27, 2009. Judging from the new screenshots, I must say they've improved those car models quite a bit.
From what I hear, they've tweaked the vehicle physics to make it seem more realistic, but they'll also allow players to use assistance while driving (breaks and so on) if you're interested in a more arcadish kind of experience:
All in all, it should be a good racer.
Link to the screenshots on ActionTrip