Anothing interesting concept, similar to the extended display, would be to create a small black box that could wirelessly send signals to a remote display unit. This way, you could install the player out of sight (trunk / boot / glove box / under a seat / etc.) and still have the display and controls available as a small "velcro attached" removable object, similar to a removable face radio.

Possible??? I would certainly be interested in a device like that for future installs!