An idea I really like

(and not the best photo of the evening, but I thought I would focus on the idea and not on the photo this time).
During a concert, an artist (or two) creates a CD cover while listening to the music. The audience can watch how the cover is being made on the large projection (in real time) and can at the end of the concert buy an original and one off CD recording of the concert with the unique CD cover. Is this great or what?