Sure, the algorithms, once sufficiently advanced, could probably trick us into thinking that certain examples of generative music were made by a person and then later reveal its algorithmic origin to prove that "the humans are stupid" and "the google algorithms are clever" but what are we actually proving here?
Can a computer devise new artistic forms that have some genuine impact on people - can a computer come up with Bacon's Triptych of George Dyer outside of regurgitating fragments of what it already has seen? What do we get out of a computer aping the alcohol-fuelled sweaty anarchic performances of The Black Lips?
The interesting stuff will be to see if this goes to other places that music has not yet gone - some new composition method - manipulation of frequency in ways that humans have not yet devised.