CamaroBoy, I honestly don't have very high hopes for this game. Why?
Well, let's see.... despite what they say that the game has been in development for so and so years, in reality, it has been in development for a mere 2 years. In order to understand the new hardware, and optimize the Forza engine for it, I say it needs well over 3 years or more development time. Testing and bench-marking is very time consuming and requires additional resources. Unfortunately, devs are in it mostly for the money, and end up churning out a brilliant product in the process. In T10's case it was both. But then again, Microsoft has it's own set of demands, which require a product every 2 years.
I may take my chances with FM5. I rather they get some aspects almost close to perfection, before moving on to other juicy stuff, like weather, night driving, and perhaps, rally driving.