I think it belongs in the GT forum as Kaz was the first to discuss this out of Forza and GT.
There is a worrying trend of GT discovering or mentioning ideas and Forza taking them and running with them.
GT Prologue was the first to introduce fully detailed cockpits, then Forza took the idea and ran with it giving 500 cockpits whilst GT5 only gave us an additional 120 over what GT5P had already shown us.
Now Kaz has floated a free roaming C Spec idea, yet to reveal any progress with it and now Forza will have a fully fledged game based on the idea, possibly with the ability to import your Forza garage across.
Will Forza give us all tracks with night/day and weather with Forza 5 before the GT series can even though GT has introduced the idea?