As long as energy isn't unlimited, humans will always have some comparative language compared to AI + robots. Favorite metaphor for this is a lawyer and a secretary. The lawyer is better at everything than the secretary, but there's still a role for the secretary because the lawyer's time is better spent actually doing the law. It'll be the same for humans and AI.
> As long as energy isn't unlimited, humans will always have some comparative <s>language</s> [advantage] compared to AI + robots.
The truth of that really depends what you mean by "humans"...
All humans? Probably not, as there are a lot of people who aren't especially capable or talented, and every conceivable economic activity they could do can be done by a machine with an AI with a below-average human intelligence and a capable robot body.
Also, IIRC, solar panels are already more efficient than plants, so I doubt there's a dystopian "humans are better for manual labor" loophole.
Most humans? Still probably no, given that AI seems to be making the most progress against white collar work right now.
Some minority of humans? This might be true, as there are people who are extraordinarily smart and talented. It seems most likely that AI will be unable to replace the people at the very tops of their fields, but there are very, very few people in those positions, and most people just plain don't have the ability work at that level.
I agree there's a lot of easy stuff that would improve life for the average person, but I hope you're messing around when you say "put them in jail" lol