The Baron Count
Member
In addition, the devs are using photogrammetry to get realistic and light weighted models of the environment, so it's actually very possible that this is what the final game will look like. Or at least the bullshots won't be too far off the final product.
I have a feeling that the final game will look pretty much identical asset wise to what we have seen which would be a colossal achievement, but the image quality will be significantly less impressive.
Didn't they claim that that original trailer was running on a PS4? I don't know if I buy that, but I think it was probably using the actual assets from that version of the game.