This is like saying that photoshop is going to put all the artists out of work because one artist can now do the work of a team of people drawing by hand. So far these AIs are just tools. Tools help humans to produce more and the economy keeps chugging ever upwards.
There is no upper limit of how much art we need. Marvel movies and videogames will just keep looking better and better as our artists increase their capabilities using AI tools to assist them.
Daz3d didn't put modelers and artists out of work, and what Daz and iClone can do is way way more impressive(and useful in a professional setting) than AI Art.