The extremely light-weight game OS does seem like a very good decision.
What I am concerned about is how well the hypervisor ensures a consistent availability of the CPU, GPU and memory resources. [Memory bandwidth and latency, not quantity.] I am assuming the big bloated OS and apps are still running in the background. Or is that a wrong assumption? I am assuming they are not frozen/suspended as the game runs.
I don't want inconsistent micro-glitch or any stuttering type behavior on my console.
I don't want to dig through forums that tell me which apps to kill before I start by game for the smoothest experience.
But maybe I seriously misunderstand the 3 OS/Hypervisor situation.
Is it a frozen/suspended apps situation? Or it is reserved CPU cores? What about GPU? There isn't a huge amount of GPU to split off and reserve.
My understanding is that the hypervisor OS should be better at guaranteeing resources than an OS like Windows would. So if the option is to run the game in parallel with other apps in Windows, or run the game as its own VM on a hypervisor, I think the latter option is probably better. I don't think the PS360 model of having the console reboot into a small OS every time you start a game is viable anymore. The self-described hardcore may want that, but it would be more limiting in terms of the breadth of the capabilities.