Just yesterday we saw some screenshots of Windows Store on Windows 8. Today Windowsunleaked has posted screenshots of the Music player app for Windows 8. The new music player is metro-styled, simple and supports album, songs pinning, etc,. There are options to buy Music as well. I think this will be a lightweight alternative for Windows Media Player in Classic Windows 8 Desktop that can be used while we are in Metro mode.
More screenshots at Winunleaked.tk