[Yes, please!]

Oh, but we need a purpose for one... hmm!

Instead of accessing previous cutscenes or music files from a diary book in our inn room, how about building some form of Opera House (like in FFVI) where players can take a break from adventuring and grab a seat to listen to all of Nobuo Uematsu's tracks. Previous cutscenes can also be watched from the viewing room by taking a seat.

Maybe add in something silly on the side where you can take up a quest to join a play on stage to earn some gil, minor experience and perhaps some opera currency to purchase decorations for your house. The play can consist of multiple choice dialogues in which you can select to reenact a dramatic cut scene previously seen in the game. It can test your knowledge of what was said and you can be silly and choose to change the outcome of the cutscene.

Just ideas that pop into my head as I'm bored at work