From what i have seen so far and my experience with vehicle physics, i think this game will be very arcadish driving.
So if you are looking for Richard Burns Rally physics quality, you might be disappointed.
Even if they say its not finished physics and they will polish it until the release, there won't be any big changes in physics at this stage of development.
In the graphics department, some of the Screenshots looks really good (Almost as good as Drive Club
) however the gameplay graphics seems to be completely different.
For the car shading, Gran Turismo already do a way better job...
Realism cannot be achieved only with physical shaders as they mentioned in the dev diary. Its so much more..
Its a lot of observation and attention to detail that will make a game look realistic.
And despite the fact of being on a very limited platform, Gran Turismo 6 do a wonderful job in that area.
As always my comments may appear technical and negative from a racing game developer point of view but hey, maybe this game have an awesome gameplay and replay value