There are some serious buttons running down the side for music control, as well as a full touchscreen interface on the front. (pocket-lint.com)
So if you want music controls on screen at all times, now you'll be able to do so and it's not app dependent. (9to5google.com)
Almost every music or media app's music control in the notification shade will now change depending on the cover art of the song. (android.gadgethacks.com)