I got a 3090 in the depths of the 2021 GPU shortage and for my purposes (mainly JRPGs) I can still run basically every new game at 4k max settings. I don't really see much need to upgrade. Wonder if the AI rush will result in a situation where the state of the art is so far beyond what's needed for gaming that gpus won't be a bottleneck anymore.
An RTX 5090 is nowhere near enough if you want to play graphically demanding games on the latest high-resolution VR headsets. Many are close to 4k*4k per eye, so essentially an 8k screen that needs to run at a stable 90 fps not to cause nausea, and ideally higher.