[Ozzy the dog]

We listen to the stars on record/mp3 etc and they are not there so why not see them when they are not there?

When I saw Zappa at Knebworth in 1979 he stayed to the back of the stage so being close to the front meant all I saw for most of the gig was his head. The hologram would have been more revealing.

Having said that - I wouldn't rush to see a hologram gig. Great technology but a bit too weird.