The fact that Microsoft has been fiddling around with apps for Windows 8.1 is not news to most people, but the interesting part is that Microsoft has changed the Music application, Xbox Music, the most.
A newly built Windows Store copy was leaked, and the new design for Xbox Music was revealed through it. The screenshot displays a new and convenient layout of the app, which should make it easier for users to flip through their music files.
Xbox Music (the first version) was launched in October for Windows 8 and RT. That version has an impressive collection of popular music, but it is still pretty sluggish. Now, the new user interface for Xbox Music is fast and helpful, and it will support files on your SD cards too.