Well this would be a very good step to satisfy the desktop users.
Read http://winsupersite.com/windows-8/further-changes-coming-windows-threshold
I personally use the free classic shell to bring back basic functionality to the desktop and I am not willing to pay for basic functionality like metro apps in windows, so this update would be welcome. My last suggestion for the desktop would be to use one task switcher (the task bar) to achieve one unified OS, incorporating the metro apps and start screen as an integrated option.
One quote from Neowin by MorganX which rang true to me: Microsoft is so lucky they have absolutely no competition in the Desktop OS arena. Pathetic. Not that I mind the Start Menu, it's pathetic that a company with their resources, complete desktop OS dominance, could execute what has happened from Windows 8 RTM, to now, to go back to the Start Menu...
In my opinion the desktop should be a (legacy) app on the tablet and on the desktop the start menu should be an (optional) launch app.