Not true. There are currently no restrictions in Windows 8 apps that say they must be Metro or whatever MS is calling it this week. Those exist only on Windows RT, which is an entirely different architecture of device and would require a total rewrite of iTunes. Apple doesn't care what Microsoft "wants" to do, as long as the majority of users are purchasing Intel (or AMD) based Windows 8 machines, nothing has to change. If Windows RT really does take off, then they may indeed create a compatible version, but the work is not trivial for an unproven and directly competing platform: think of it this way, would Apple do an iTunes for Android? Thats the real comparison to make with Windows RT.