Games are already doing that.Setting aside foveated rendering, they would probably benefit a lot from being able to render statically partitioned areas of the screen at a lower resolution. The 4K pixel density is probably overkill for the actual resolving power of the glass and eye in the periphery of the screen. In the case of the glass, you don't need eye tracking to know what portions of the image to render at lower resolution.
Multi-resolution shading is a way to accomplish it on almost any HW.
Lens-matched shading using multiple projection matrices is an even more efficient way on modern GPUs.
What is "8k content"?There is no 8K content worth playing on VR
I have a lot of VR games, and I can't think of any that wouldn't benefit from higher resolution.
I think many people underestimate the resolution you can run current VR games at on a really high-end PC.All existing openVR games?
Something like Assetto Corsa or Raw Data would benefit immensely from an higher FOV and reduced screen-door (and those two games I can already run at crazy high res anyway).
As I said before, even on "just" a GTX 1080, I'm running everything on at least 10 MP (and this HMD is 16 MP).