The 3080 might be the perfect card for high refresh rate 1440p gaming, so I'd definitely recommend the upgrade. My main monitor is a 175hz 1440p oled ultrawide, which my 4080 handles decently well, but definitely wouldn't wanna go 4k on it since I'd have to turn settings down a lot more, even for just a stable 60 fps.

I have a few requirements for my next monitor, since I want it to last a long time:

1. Micro-led, since it'll have the benefits of oled without much risk of burn-in.
2. 4k, because if I'm gonna have it for 10 or more years, I want it to look as good as possible, and 4k is very future-proof.
3. Superwide, because I want to replace my three monitors with just the one, as multi-monitor support isn't great. There will probably be 4k micro-led TVs long before there are monitors, but I don't want a TV as it's just terrible ergonomics for use on a desk.