Wow, this looks really cool. One curious idea that might be worth exploring: writing a Vulkan guest driver on top of this stack. It would be a novel approach,

Wow, this looks really cool. One curious idea that might be worth exploring: writing a Vulkan guest driver on top of this stack. It would be a novel approach, as the guest would see a Vulkan-centric view of the world (making development really simple), but that "world" would be easily transportable between machines, regardless of said machines' host graphics stacks.