The faux Shakur greeted the Coachella crowd and shortly thereafter Snoop Dog and Dr. Dre performed a well-known song, "Hail Mary".
It has been reported that Dr. Dre will continue to take the hologram Shakur on tour in the future.
However this resurrection of the deceased is nothing new. It reminds me of the female artist, Natalie Cole, when she released the video "Unforgettable" with a projected image of her dad on the screen. This was in the early 1990s.