It is not just GPU performance, it is that visually things are already very refined. A ten times leap in performance doesn't really show as ten times the visual spectical like it used to.

Like all this path tracing/ray tracing stuff, yes it is very cool and can add to a scene but most people can barely tell it is there unless you show it side by side. And that takes a lot of compute to do.

We are polishing an already very polished rock.