- It seems like Sony chose to showcase "improvements" in games that already look pretty good, but there are other games for whom the improvement will be pretty dramatic (I've heard FFVII Remake cited as one). There may be an element there of Sony not wanting to put the worst offenders on blast by showing side-by-side of how shitty the game currently looks versus how nice it'll look on the Pro, which is interesting.
- Fully agree that unless you own a 4k TV, you probably won't give a damn. I don't and don't.
- I somewhat disagree about graphics plateauing, but I do agree that progression isn't 1:1 with hardware. I recently finished Alien: Isolation, which is an excellent game but showed its age in some areas (crappy smoke effects, uncanny facial movement even in pre-rendered cutscenes, etc). On the other hand, Metal Gear Solid V still looks amazing to me despite being just as old—and both were games that came out simultaneously on PS3 and PS4, so they're equal in that regard too. But PS5 games blow me away in areas that even the best PS4 games didn't: Horizon Forbidden West has mind-blowing water effects, parts of The Quarry (granted, many of them pre-rendered cutscenes) legitimately looked like a real movie, and Returnal is just all-around gorgeous (plus smooth as butter, to boot). Little things like non-shitty textures, objects interacting correctly, and halfway realistic hair really add up.