As a piece of technology, it is indeed impressive.
As a potential pointer for the future of music entertainment - less so.
I have always believed that bands that have had their day and gone should leave it alone, and not reconvene in their fifties and go around the circuit agaim playing their old songs - it's almost a mockery of what they were.
So - The Specials reforming is a bit redundant and going-through-the-motions, but Duran Duran touring is not, because they have never split up, so there is a constant thread that runs through their work and keeps them relavent.
If you move that logic on, then Tupac, who as not only sold more albums dead than alive, but has also released more albums dead than alive, is being pedalled as an image of how he was fifteen years ago, at the height of his popularity, but forever forzen im time as this hologram, which is less a clever piece of visual art than a commercial cash-in and a potential pointer for the future of deceased musicians.
If you really care about music, and you are in the minority here, this will ring a slightly sinister bell, but if you are a casual mass consumer - and the majority of the world's population are - then this will seem like a good idea and a chance to experience a dead musician as they would have looked and sounded.
But just because you can do something, doesn't mean it is always right to go ahead and do it.
So in the immortal, and frequent words of Simon Cowell - it's a NO from me.