Then the appreciation is subjective; to replace an artist you would need something like; 'I like Rembrandt but now I like this guy instead'. I used to like Jean Michel Jarre then Beethoven then Iron Maiden then Slayer then ... etc. I still like all of these and can get excited when hearing any of them. No one of them replaced the other.
So we might have MORE artists. Once we accept that computers can make art 'without' humans. I am fine with that, but this example is definitely not a very good example. To me it looks like fancy filters.
Huh?
In the meantime, there are tons of underground movements and scenes, coming up with new sounds and styles, and the artists we generally accept as proper such (and not just performers), belong to these, feeding new styles into the mainstream.
Something similar will probably hold true for computer-made "art": Some very nice and enjoyable things will come out of it (and tons and tons of trivial and dull things as well), but the truly interesting stuff is made by humans further up the funnel.