iTunes not being on Windows 8 RT might be a problem
Many people use iTunes. It is probably the most used program right next to Office. All I am saying is that future Windows RT Desktops will have angry customers if there ipod or iPhone don't work on them. We don't know if Apple will make a Metro App for iTunes, I myself believe they won't just to prevent Windows 8 tablets from selling more.
Another thing that has been in my head is where the Devices option on the Charms bar would show you your device like a Zune/ipod and automatically sync your media.That way they would go around the iTunes problem. But that's just wishful thinking. What does the Devices option on Windows 8 actually do again? I don't use the charms bar unless I check the time.