For me the only 8K content i tried on a VR display is just cranking up a game to 8K wich looked really good but also showed the textures and model geometry is not ready for that and also the games i tried ran at very low frame rates. But when i wasn’t moving around i could see very far, very clearly because of the amount of pixels per degree. I tried the witcher 3 and resident evil village maxed out. Running on a 3090. Village was insanely good looking but it was using all of the 24GB of Vram of the 3090. I really liked the visual settings in village. For me 8K on a VR display is more about having a big panel separated into small windows that all look clear.
I’ve heard at least one japanese TV channel offers 8K content from time to time such as 2001: A Space Odyssey, which has an incredible native resolution because it was filmed with a NASA camera. Other than that, I haven’t heard of anything.
There’s barely 4k content to miss out on. I guess there’s UHD Bluray, but many (most?) streaming services find some way to not provide 4k. My internet can barely handle 4k, 8k would obliterate it.