I personally think the definition in Wikipedia captures my sentiment quite well:
> Art is a diverse range of human activities in creating visual, auditory or performing artifacts (artworks), expressing the author's imaginative, conceptual ideas, or technical skill, intended to be appreciated for their beauty or emotional power.
Since I limited my discussion to art meant to be consumed for "consumer-grade" entertainment purposes, I'd focus more on the last part. I just think that it is possible, maybe even likely, that by using ML, we may at one point be able to "pinpoint" what humans, perceive to have "beauty and emotional" power and generate that. Have the networks learn the same rules that artists learn indirectly, so to speak. And I while this is probably a really hard problem, I don't see why this should be the "last" problem to be solved - we seem quite a bit closer here than we are in many other domains.
I think it is not all that difficult to argue that math is art.
Sure, some questions posed by mathematicians (such as "Is god's number 20?") can be proven by computers with rote brute force, but the actual creative process of playing with a given system, adding and removing constraints, and seeing what emerges is very much a creative and artistic process.
One of the easiest ways to see this is to read a good math paper. They're rare, but good pieces of math can spark the same sort of feelings that a good pieces of art does.
But I mean it in the sense: Sensory inputs that evoke certain emotions (awe, fear, joy...) in the human brain - that should encompass most things people immediately associate with the term.
If we ever have strong AI, reverse emgineering human nature and an AI having the human experiences of a human lifetime seems in the same ballpark of difficulty.
Of coirse, human nature may be passé at that point, especially for AI readers, and ersatz poetry more popular (just as electronic instruments have displaced "real" physical instruments in popular music).
So even the author does not know if they are human or AI?
This means there will be a LOT of other changes that will be occurring as well, if that happens. And that it is unlikely to happen in the next decade.
Like royal families today.
I think the last jobs remaining will be the cleaning jobs. House cleaning, for example: try to have a robot take the dust out of your precious glasses collection. Or just fold your clothes.
What scares me is when AI start to generate "art" for other AI.