Any news on the protogon file system thingy.
It's in my original post near the bottom. It's called ReFS (Resilient File System).
I've had Win8 installed on VMWare Player for a few months now and have noticed no sluggishness in the UI and the experience has been excellent. Hardware accelerated video works as does FlashHD without issue.
I tried the Dev Preview with VirtualBox and VMware, but even in VMware it looked like the UI was running at around 30 FPS, not 60 (my monitors refresh rate). Either way they'll always be a performance hit with virtualization, and sometimes it's only milliseconds that can make an OS feel faster. And things like the faster boot times dont work in virtualization.