The Billboard Awards featured this hologrammatical (?) performance from the late Michael Jackson. 

Of course, it's not the first time we've seen something like this.  Here's Tupac as a hologram from a few years ago:

Here are the top 3 Hologrammatical (ha!) performances I'd like to see:

1) Elvis at Graceland

 

2) Ronald Reagan's "At Time For Choosing" at the 2016 RNC.

3) and really any performance by the great Mitch Hedberg.