Yeah, so basically I think the most impressive shots of the game are just the normal ones you see when playing. Unlike GT, the car models are pretty so-so and it's really the whole package of cars + environments + weather/lighting that makes it look like the best racing game in existence.
PGR3 was the game I used to show off my HDTV at X360 launch. PGR4 is the game I use to show off my HDTV now.
Also while I need 60fps in some genre like action games and fighters, at this point I'm perfectly fine with 30fps racers IF they can pull off 30fps + motion blur as well as PGR3/4 do. PGR4 feels so smooth and fast...