Nothing last gen about this game?
https://i.imgur.com/32AjPeh.png (ignore the colour, it's an SDR screen shot) folks are already talking about this aspect in another thread, so I won't go into too much detail, but the environments are really polygonal and just generally bad. Like they are stuck on low settings or something.
As for HDR, if I take this video of GTS and play one from say Horizon Zero Down, Ratchet and Clank or even Deus Ex MD, it doesn't hold up.
The thing is, the lighting on the cars is already impressive and is already the stand out feature without HDR. HDR itself doesn't cover up the shortfalls, and the cars still have horrible reflections at times (in the demo roll especially).
With Deus Ex MD, exiting a dark area and looking up at the sky is an entirely new and different experience in HDR. It's done so crazy well and fits the art style so perfectly that it adds a new dimension to the game.
Or how in Ratchet and Clank makes you feel the heat in the lava or Forza 7 gives the lightning the ferocity it would have in real life.