I feel like jukeboxes aren't as cool as they could be. I think that a new inventory should be added for the jukebox. This is how the team at Mojang could improve them.
The arrows would move through the discs in order (top left to bottom right). The shuffle would change the order of all the discs. The music would loop 24/7 as long as the jukebox is powered.
Vote for the idea here if you like it.