After a player says he thought he'd heard something he'd never heard before on the PTR, Hortus says that yes, there is new music in inns all over the world of Azeroth.
Which seems like a strange addition to make, and an even stranger change to leave out of the patch notes. Personally, I have music turned off maybe 90% of the time-- while grinding, I'm usually listening to my own music or watching a movie, and while raiding, I'm listening to my guildies on Teamspeak. While I like the Warcraft music as much as the next guy, I can only hear it so many times before I'm ready for something else.
But I supposed after the next patch comes on, I'll have to flip it back on again and have a listen. You have to wonder why they're spending time implementing new music when there seems like so much else to do, but maybe these are leftovers-- music written for Outland or other new content that Blizzard didn't have anywhere else to put.