People actually use Windows 8?
I do as I need to test sites on IE and develop in C# using Visual Studio. And after getting used to it a bit more, I'm not hating the software. It appears stable to me and fast. I don't like the stupid 'metro' interface and the full screen programs but in desktop mode it's just better.
But... I'm using Win8 within Parallels. And I prefer Win8 over Win7 already. I guess I wouldn't like Win8 to be my desktop OS.
Back on topic: iTunes for Metro doesn't sound too bad, especially when Apple decides it's time to redesign the iTunes functionality. To me, iTunes is by far the worst product Apple has made. I hate it when I need to use the software to synch my iPad / iPhone, to organize music (yes, I have about 10.000 MP3 tracks legally on my NAS and I'm using Match) etc. Please Apple, do something to increase the speed of iTunes somehow.