One company based its marketing on performance and performance alone, I'll give you a hint:
Series S has some 900p games as well.
PS5 does exactly what it was supposed to do: Deliver a true next-gen console experience, we have some 4K, some 1800p, some whatever else. Truth is, even a very high end PC GPU / CPU combo won't give you locked 60fps at native 4K in all games unless you sacrifice graphics settings (which is fine by me, but on a 4K TV I would rather cut to a slightly lower resolution to be sure that the frame rate doesn't drop dramatically).
PS5 has 8K output, but again... I have never seen Sony even imply it would run modern games near that resolution, unlike say, MS who implied the one S could play at 4K (the og advert for it talked about games/gaming and went on to mention 4k, which was for video content only).