I think you can expect about the same as with the PS4 Pro. Maybe finally this time it will be a smooth actual 4k (ok actually, UHD) gaming experience. But that's kinda what we said last time too, so I don't know.

Developers would still have to optimize their games to get the most out of the hardware, unless we're talking about a game that was already performing suboptimal and throwing raw power at it will hide the surface level problems so it looks smoother.

I would love to see all this horsepower being used to actually make the games better by design, like pathfinding and NPC behaviour. The last big breakthrough we had was raytracing, which proved that it wasn't photorealism that makes it look better, but accurate lighting and shadows. For the consoles it was using an SSD for almost instant loading times.

But I digress. I'm not upgrading my PS5 either, but I can see the value for power users that play competitively or something.