New screens:
Mentally remove the motion blur, and that track really does look quite average.
The shots have very high contrast in their lighting, so the darker details are missing. I'm thinking this is what makes it look less rendered.
Something funny about the motion blur in that shot too. There are no obvious errors. The transition from road->car shouldn't be so accurate (unless both are rendered separately). Also some oddities with the depth of field in the 2nd shot.
Overall though it does look very nice. I'm just inclined to believe these are photo mode shots for the time being.