This is possible now, but in xen or vmware you need to buy a nvidia license to unlock this feature. You can trial it for a minute in a lab but you can't give 4 guests each 2gb of vram on your graphics card without Nvidia specialist proprietary driver on both the host and the guest.

For vdi where you can buy 48gb rtx a6000 graphics cards, with architects (for example) each user getting each about 8gb each, you can 10 guests concurrently per card. Which at a few hundred architects scales better than buying many $5000 dollar workstations that struggle with WFH.

For a home user, maybe being able to split for your two kids on a standard rtx 3070 with what like 8gb might be OK? Probably not though.

Right now I have a hacky way that isn't really supported in nvidia to split graphics cards to two guest vms but it's neither license compatible or what I'd call "production ready". I'd like proxmox to be able to handle this out of the box because it's already in the kernel.

I've no idea what this means with licensing though. The yearly license cost to allow you to use your driver is actually stupidly expensive. The Rtx A series cards are already dumb money.

Either way it's a good thing, but probably not much news for the average enthusiast