jiannu
For you, going from a 3080, I would snag a used 4090......I bet those things would be dirt cheap when the 5xxx cards come out.

As far as c4, I'm coming from an lg 50" it's not oled and it mid tier, but at the time it did have 120hz @ 4k. I do watch movies and browsing on it and love it.....I can't wait to try out the c4 48!!

Yeah I'm currently in the midst of trying to get something with more RAM to drive my 4K 48" OLED and my 24" 1440 reading pane. Some games are a struggle to get over 60FPS.
 
You're in for a treat, OLED is an entirely different experience man. Especially if you're in a dark room where you can fully appreciate the blacks being completely black.

I'm contemplating on finally upgrading still running a i9-10920x and a Evga 3090ti. Even though the i9-285k is slower in game performance than the i9-14900k it still going to be way faster than what I have and not sure if I want to upgrade to a EOL platform.  98003XD looks good but not sure if I want to go the AMD route. Plus Since I also use Cad on my gaming computer think the i9-285k might be faster than the 14900k. What you guys think?