What happens when AI art, songs or books are indistinguishable from human-made stuff?

What happens when an AI mimicking human behavior/thinking is indistinguishable from you and i? At what point does it stop being imitation and can be considered the same thing but better, more efficient?

Right now you get people getting attached to AI chatbots, looking for emotional support or a confidant of secrets. You get people tailor making art or music. You get printed books that can only be identified as AI made because of a mistake in the copy-past proccess.

Perhaps the technology doesn't allow for fully satisfactory results at the moment, but eventually they will, what happens then?

If you can produce the songs, pictures, stories or movies that precisely fit your specific tastes at the push of a button then where does the value of human creativity go? Is there any value to human creativity anymore or will it become completely obsolete as the technology progresses?

If any text can be forged, any picture generated, any sound fabricated, any face replicated, any "truth" generated then what?

If jobs are automated and artistry completely replaced then in a few decades time what will be the purpose of human existence?

Matter of fact, you can't even be sure there's a person behind this post or if i'm a bot farming engagement