I'm pretty sure that's not CGI because GT5P was almost that good and it's more than a year old.
Remember that racing games are not as processor intensive as, say, an FPS because they only have one (or at most 3-4) possible routes in each track with ~20 relatively simplistic AI objects instead of having an entire interactive 'map' with dozens or hundreds of complex AI characters.
I don't know whether GT5 or Forza3 will be better (and I don't really care), but GT5 will kick butt in graphical quality.
Not trying to be a fanboy. Of course, it's hard when you own the best console eve... dang it








