People saying it look cross-gen can probably only point to Wukong and maybe Horizon as looking better, and one of those games is running on UE5, and will probably require a card that costs at least 2 PS5s to run it at a decent framerate.
I know this forum is full of jaded people, but seriously, get a grip. Cross-gen means absolutely nothing when there's nothing else in the genre that looks like it on consoles. This and HFW look amazing. I'd say something like UC:Remaster is what a cross-gen game that is being held back by last gen looks like, because that's a game clearly built for last-gen, and only received a minor facelift for PC and PS5. GOW will not look this good on PS4.