I recently got an RTX 2080 Ti (because the 3000 series is nigh on impossible to get), so I have been seeing the loveliness of 4K ray traced gaming. Control looks pretty awesome, so does Bright Memory. Devil May Cry 5 looks sweet on max settings as well, and plays so smooth at 4K60.
Running a 2070 myself and getting some really great results; haven't run into any hiccups running anything at 4k 60fps. By next summer my whole build will be two years old, though, so I'm thinking by then I might be in the market to look into upgrading a few parts then. Definitely want to transition from HDDs to SSDs...
I just put together a 'Top of the range, last gen' build to replace my ailing old workstation.
H100x AiO cooler
32 gb ram
WD NVMe 1tb ssd
2x 2tb HDD
RTX 2080 Ti
Might go for a better gpu when they're cheaper/actually available, and a better CPU when the bios update allows for Ryzen 5000 series, but for an upgrade over a xeon x5687 with a GTX 1060 6gb, it's pretty stonking.