I’m going to come out and say that this is in poor taste. This isn’t the end of the world. It’s not even “an outrage”. But it is in poor taste.
A hologram of a long-dead historical figure—Abraham Lincoln or Alexander Hamilton—might be interesting. Whitney Houston, however, passed away less than a decade ago. She’s still very much within living memory.
And while yes, there is a case to be made that a celebrity belongs to the public domain, there is also something to be said for respecting the dead.
Just because technology can do something, doesn’t mean that it should.