You will know it when you see it.
Nobody will care where their art comes from any more than you care about how your food's field was plowed; and all their lives will be better for it.
Keep your comment somewhere. Come back to it when you look at a new tool that promises to merrily trample on your entire field’s income and provide an endless source of “usable, I guess” substitutes. Let it provide solace as you stare into a future with no room for the craft you’ve spent a lifetime honing.
Software development is heavily labor-constrained, if copilot can make everyone a 10x developer, we'll get slightly less than 10x the features-per-year on an industry-wide basis after contributors shuffle around.
The effect will be most pronounced in application development, where a team of 1-5 is about ideal for a coherent app made with taste, and that team could produce the output of 10-50 developers. Not such a bad thing.
Unfortunately this is unlikely to be true for visiual art, I don't predict that making artists ten times as productive will meet a latent demand for ten times as much art. Could be wrong, but my sense is that about as much art is purchased as people want to buy.