you can make a game impressive based on graphics but not fun, engaging, addictive, etc.
Sorry, you will have a tough time convincing me or any sane person that the graphics in the second screen grab to do not make that game more fun, immersive, or engaging than the graphics in the first screen grab. If you took Project Cars and changed nothing but replacing the graphics with Rad Racer graphics, the game experience would be completely different, and not for the better.