Well obviously Microsoft wouldn't want to give a cut to Apple but the underlying idea is not so bad. Parallels Desktop and VMware (virtualization software for the OSX) already include an easy Windows purchase option in their installation process. I'd love to purchase a 'Windows 8 for Mac' edition directly from Microsoft if it means they'll have drivers and everything supported. I'm waiting for proper Windows HiDPI support in Bootcamp for my Macbook Pro retina as it is.