It's not a holograph show. It's Carl Palmer, with a bass player, and a guitarist who makes the guitar sound amazingly similar to Keith Emerson's keyboards. The bass player also sings, and sounds a lot like Lake. The large screen is full of clips of Keith and Greg. The large screen also shows a live performance of a keith Emerson solo from the glory years, and a Greg Lake live version of Luck Man. Carl is still an amazing drummer, and the show was outstanding. I highly recommend it for any ELP fan.
Oh.. and you should have stopped listening when you got to "Love Beach"