Thanks for this.
I've done my time with this for now. The under the hood changes may certainly be welcome, but the interface isn't for me. I don't want to have to pull anything down to 'glance at my desktop'....desktop is where everything happens for me, I want it up front.
This still being pre beta though I'll just wait to see where MS takes it. Hopefully metro will simply be relegated to an optional sidebar type app or it's own window like the control panel, anything that gives the option of not having to look at it - I don't want it, not at all.
So I stuck linux in my vm....just so I can feel sufficiently geeky.