8k gaming? Supposedly 3090 is capable, but I gotta ask - who games in 8k? 8k monitors are still far too experimental.
Not to mention that scaling is going to be a pain.
Not to mention that scaling is going to be a pain.
Until the angular resolution of a pixel is good enough an inch from your eye there will be increasingly higher resolutions in the HMDs
I think it's more that if you can render 8K at 60fps, you can probably render 4K at 180fps or more which gives you a lot of wiggle room on a 60hz or even 120hz display.
I tried playing a few games at 8k (just for fun) and found that it simply wasn't worth the frame rate hit, or really even that noticeable an improvement with the assets in the games I tried.
One nice property of 8k resolutions is that they have an integer scaling factor from both 4k (2x) and 1440p (3x), so if you have an 8k monitor you can play games at either of those resolutions with high quality scaling.
I had a 4k 32" monitor at work and found that it simply didn't give sharp, high resolution text, driven by either a Macbook or by a Linux box. And you wouldn't really expect that, either: a 4k 32" monitor is only ~140dpi, which is only marginally higher resolution than the ~100dpi screens we had for many years.
I think the best point of comparison for the Dell UP3218k monitor which I have is a Retina Macbook Pro screen: subjectively, it's a similar experience in terms of text sharpness and legibility (>200 DPI, glossy), just in a 32" form factor.
I suspect 8k at 32" is actually a bit higher resolution than necessary (~280dpi), but there's nothing else on the >30" high resolution monitor market other than Apple's 6k display, which is significantly more expensive.
Be aware that there's no Mac OS support for 8k displays, but Linux and Windows on a desktop with a reasonably modern NVidia GPU work great.