It's hard to tell just how the in-game racing will look like as Turn10 tends to use lighting tricks in their trailers. Everything to have a couple filters over it, so we'll see. Probably be a shiny version of Forza 3.
They've also took a not from NFS and are recycling their car models. Looks like 90% of the cars are from Forza 3
And...they're gonna use laser scanned cars for photo mode. So...you'll have the super realistic photomode model and the crappy in comparison in-game model. Gotta be careful doing that or they could shoot themselves in the foot. Also, it didn't look like there were many options for moving the car around in the selected invironment. Seems like they're trying to do something similar to GT5's photomode, but I don't know. Almost seems like you get one pose for the car and then you move the camera around it.
Also, if that's how the on-track photomode is, I know all the Forza fanboys are gotta start taking pictures and saying "Look our cars look better than GT5!" which would be a lie, 'cause laser scanning cars is called cheating and those laser scanned cars are NOT the same models as the in-game cars. Not even the PS3 could pull that off.