I know the issue with that is the crappy job MS has done in making Win8 a tablet OS.
I wouldn't say they've done a crappy job, so much as released one only half finished. If MS could get the WinRT API up to old Win32 levels in terms of power and flexibility, along with streamlining some of the looser ends present in Win8, it'd be fairly decent.
As is, Metro feels more like a foot in the door measure than a complete OS by itself. Really, that's the problem with MS' entire tablet strategy in general. They have a ton of good ideas, and I like the general direction they're going, but the execution of said ideas leaves a good bit to be desired. It's a lot of promise only half implemented.