One thing is for sure, it will all be different than we imagine it now
For sure something could show up and bowl us all over. My bet is on catastrophic climate change leading to Mad Max but my hope is friendly aliens offering rides.
To be honest, reading these viewpoints I feel everyone is acting like carriage salesmen ignoring the death knell that was the arrival of the automobile.
The technology will get to the point where it can produce art at a quality none of us here could reach, and it will be able to produce it at a speed we can never hope to match.
More importantly, the tech will get to the point where it won't need to steal from artists to operate. At that point some company... and lets real: It'll be Disney... will have it legally categorized as just another tool akin to a pencil and thus they can copyright and trademark Mikey Moose or whatever it is their "Imagineers" come up with.
Humans will continue to create. It's part of what we are. And some people will get jobs feeding ideas into the DisneyTronTHX1138 machine. But once tapping in a list of commands to get personalized art/music/movies/porn/comics/etc becomes as commonplace as smartphones, you, me, Drake, Chris Evans, Cherie Deville and everyone else working in a creative field will become part of history.
We can check back in 2038. Either I eat some humble pie because the glory of the human spirit wins out and human artists are greatly valued despite us currently not being valued by society, or I collect my Casandra Award and then ride off with the War Boys to go find some water.