I would love to see this in Windows. It looks very easy-to-use, it isn't too "cluttered" like some others I have seen on the internet. Everything appears to be perfectly sized and placed, everything is easily readable/visible.
I hope the buttons at the top ("Updates installed" and "Windows Features") backcolor turns black on hover with the forecolor going white? Either way, it looks nice.
Why Microsoft doesn't metrofry the desktop as much as you have in this concept is beyond me, They should take inspiration from your work. The only thing that I don't think looks right on the current explorer for Windows 8 and your concept is the title bar, if you look at [link] you can see the title bar is part of the UI as well as [link] With the first image you can also notice a picture/avatar in the right corner so it looks like it is integrated with windows live which is what they should do with explorer.