But one other cool thing about the new unreal engine, as I understand it, is that the games ship today with the ability to scale to future hardware.
I think Sony had something like that planned for the PS3, but it didn't quite work out. The reason I think this is because most physical copies of PS3 games come with dramatically higher resolution versions of all textures on disc. They never get used on real PS3s, but the RPCS3 emulator can use them in conjunction with 4k rendering to make PS3 games look a lot less dated than they are. Obviously things like poly count remain unchanged, but it's still a big step up.