Best idea I've heard to date regarding Windows 8. I would pay to get the Win8 desktop improvements on Windows 7: task manager, file transfer dialog, file explorer ribbon, etc.
Furthermore, when someone does send you a link for a Win8 app you won't be able to run it. Or if you want to developer a Win8 app then you won't be able to.
I've been using Win8 since the release preview as my main desktop machine and as a desktop OS it's almost strictly better than Win7. The Metro UI is just a curiosity at the moment as I don't have a touch screen, but Win8 is still a better desktop OS than Win7.