I upgraded from a 3080 to a 4080 and the majority of games can do native 4K and those that need DLSS can do so with quality (1440p). So if you run 1440p 4080 levels of raster and RT, it is doable at native. Though this assumes you are aiming for 60FPS minimums on a VRR monitor.
If that can be had for £500 - £550 it’s a decent but not amazing price/perf.
At this price/perf it would potentially mean close to 4090 performance for £900 - £1k. Hardly amazing there either but this is right where Nvidia and to a lesser extend AMD wanted us.
At this point all my excitement is waiting to see what joke prices Nvidia push for the 5090 and 5080, and even more on how AMD manage to score an own goal and shoot themselves in the foot while doing a full clown act all at the same time.