I'll repeat my belief from one of the build threads that it's a horrible concept.
Tried it, and found it horribly restrictive and limiting, not something I want anywhere near my PC or phone for that matter.
I wouldn't touch it with a bargepole personally, and while it has *some* merits for the handheld sphere of devices, I wouldn't waste too much time on it.
Having said that, a Metro-style theatre view skin may well be an essential in terms of attracting customers.
-Leezer-