One measly hologram? Peh. Coachella can do better than that. How about an all-hologram lineup?
You know full well that once promoters realize the computer-generated Pepper's Ghost only costs between 100 and 400 grand to produce and has a much less demanding tour rider they will be all over this idea, so you might as well get used to it.
Besides: I'd take dead Frank Zappa over living anybody.