It's not that they are particulary impressive. But too clean and composed. Obvious bullshots but it might look like this in motion, yes. Not in a gameplay screen. Ofcourse we just may have different eyes.
Composing an image doesn't make it a bullshot, that just means it isn't actual gameplay. Also, you say too clean - Isn't that the hallmark of PC screenshots? AA, downsampling AF etc. it's super easy to achieve, just depends on the hardware you have as to how playable it is. Nothing in those shots say bullshot to me, looks like a decent shot you'd find the high-res screenshot thread.
It's about what I'd expect out of a cross-gen title:
-Better reflections
-A fair amount of tessellation
-Improved texturing on the cars
-Some moderate enhancements to the objects in the environment and draw distance
Notably these are all things you can turn off and get pretty much the same game working on current-gen.
Yeah I agree, looks like the natural progression you'd expect out of a racing game.