The Dell UB3218K came out some 3 years ago and it uses a pair of DisplayPort cables which still need DSC to work. A new logic board for the UB3218K would solve the bandwidth problem using HDMi 2.1.
Now that HDMI 1.2 with 48 gigabit speeds can handle 8K60 with HDR fine. 4K144 panels are now widely available which is another idea. 5K and 6K panels are far fewer in number. The Apple 6K panel uses USB-C to supply the signal which is awkward for a PC.
At present few monitors have HDMI 2.1 support but in Q4 2022 it may well see some new panels come to market that are higher resolution with HDR support. HDR supports 1 billion colors which is something that given richness and contrast to games. HDMI 2.1 can support all VESA modes so older games are fully supported.
The Sapphire Toxic Radeon RX 6900 XT for some reason does not support DisplayPort 2.0 so HDMI 2.1 is the best cable option. Products incorporating DisplayPort 2.0 are not projected by VESA to appear on the market until later in 2021 suggesting the next generation video cards will be needed for 77.37 Gbit/s bandwidth. The need for more bandwidth is motivated by 8K HDR bandwidth requirements.
16K panels are not yet available which is rather extreme. Even RX 6900 XT CFX is going to choke at 16K. Still 16 for movies is likely to emerge soon when Red can come up with a new camera. The latest Red camera is 8K120 so it may be a few years yet before they are in the market.
So HDMI 2.1 can handle a good panel for contemporary gaming just fine. Nothing wrong with HDMI 2.1 which is well supported by every panel out there except Apple’s overpriced offering. Right now 4K panels are affordable and some 21:9 widescreen panels are now available suggesting that a curved display may have some panoramic advantages.
The LG 27UL500-W is a 4K60 HDR panel. This panel is small but very good quality but the stand is the weakest part. An attempt to get a desk mounted VESA mount failed due to a design fault. So far the panel has been extremely good and work and gaming alike are all handled well. The Panel is very energy efficient using only 35W which makes it a very low cost operating device.
Monitor mounts vary substantially and trying to find one that will clip on the desk to allow it to be better viewed is costly and so far few have been suitable for a thick executive desk.
It has been reported here and there that LCD sales are soft. This should cause prices to soften and make new models more affordable. This can afford to research ergonomics a bit towards placing a new panel on the desk.