I agree with the other guys that is a great looking driving game for the 360 - it really pushes its capabilities to the limit.
The cockpit view is a good addition, if not essential nowadays, but it is a little sterile - little in the way of movement and not much feeling of really being inside a sports car going at 120 mph or more. Also, I don't feel as though I'm actually going 120 mph in the demo cars......maybe it is more realistic......as I've never done 120 mph down a country lane !
So yes, it's a little boring compared to Dirt and Grid...and of course NFS Shift, but, it is more of a sim than those games, which are VERY arcadey...but VERY fast !
So, it's horses for course really. Do you want realism, or high-octane exitement. Personally, I like all of them, except NFS Shift (because it does not allow you to use the sticks for accel/braking).
I will have the best of all worlds.....fast, unrealistic exitement with Grid and Dirt, and a slower-paced, more thoughtful and arguably, skillful, Forza 3.
These games ARE different...arguably not really comparable.
And yes, I too am loking forward to Gran Turismo...it MAY be better....BUT....will we ever get it ? Forza 3 is HERE.....NOW !
The world may end before we ever actually get GT5 ! So, a bird in the hand..........