You're a braver admin than most if you want to upgrade your corporate network within 6-months of the new OS coming out. Most corporate networks wouldn't start upgrading until at least 12 to 18 months after any new critical infrastructure (such as Windows) comes out.
Good luck to you, you're a braver man than I.
We have tons of "public" access computers, the idea of allowing anyone to install anything at anytime doesn't fly here. Even if it's free.
Yet you probably let them play flash games on the Interwebs. Metro apps don't run with full permissions. They aren't normal programs.