Just the Title Bar across the top with the "Touchtone Audio System" If that was able to be hidden, it would look better to me.
As far as the vintage vs. modern thing, let's face it, if you're putting a touchscreen or a monitor in general into a box with the express purpose of emulating a 40 year old jukebox, you're really not going for that vintage look.
There was a guy here that stuck came up with a way to take a vintage jukebox and use the pushbutton system and make up new labels to make a selection and have the jukebox play that way. I think he had a small 2 line screen integrated into the front so that he knew what was playing but otherwise, it looked authentic.