Finally leaked, Microsoft's Windows 8 companion app
In Windows Phone 7, we use Zune to administrate document, made music library and upload in to the phone. And Microsoft has told that they will removed Zune and use X box Music instead. And this is a picture of it.
Window 8 companion app basically use same as Zune, to do music library, buy music and video and upload them to Windows Phone 8 device. But one of Windows 8 feature is sharing same Windows core that make a program easily to porting between Windows 8 and Windows Phone 8. New Microsoft's Windows 8 companion app will have a Skydrive integrating function.
Or you could say that all you upload to your Windows Phone 8 or Windows 8 device will upload to cloud. But I think this is a problem. Some people always has a thing they don't want to give it on Cloud. Microsoft should care with this issue.
Wait for more information in Nokia Event 9/5 in New York.