This morning, I was flipping around the internet and found a post about the holo-tupac by MTV of all companies and they asked if it's good for music. My answer to the overly general question has to be, yes, it's not going to kill the normal performer and even better garners it's own fans that aren't normally attracted to music, but the technical art of such a craft. Japan has had this for years with Vocaloids, Vocaloids being digitized voices of existing J-pop sensations basically sold in kits that you can set to sing a variety of songs from traditional Japanese to do the a cappella version of the Dr. Who theme:  

This technology has expanded and become so popular they have given all the "kits" their own personalities, appearances and taste (down to favorite food). They got concert performances where like Tupac at Coachella we have  of people attending (which a S*** load do) to see these Holograms sing these songs, some of which are just simply covers of the pop idol they are created from:

Now with that in mind I can easily see a "Tupac" come back if the Shakur family okayed it, same with Biggie with the Wallace family...we all know Courtney is gonna do it with Kurt. But, what about the future will we see a full digital performer based loosely off someone we never have heard of before? I wouldn't doubt it, will some performers as they grow older and start losing their vocal ranges and body starts to go switch to digital performances? Possibly, I however never see real performers going away as the voices of these digital ones got to come from somewhere and not everyone will be able to afford to go digital or have a high quality model like Tupac.

Mind you I have no idea where the digital performer concept is in other places around the world as I'm not to heavily into the scene but knowing it's coming to America i'd just want to spout off my thoughts.