I read the "imagination" as prelude to "Jevon's paradox" for AI. It might be that we simply don't know yet what using AI fully means, and where else it can be used and how. Electricity was initially just for lighting, but now it's everywhere...

This doesn't scale, because like in a factory that gets replaced by robots, or in a supermarket with self checkouts, not everyone gets to save their job, regardless.

Also, the increase in output is meaningless when the amount of customers doesn't scale in similar size.

Then there are the constraints of physics, there are so many humans in the planet that actually want to pay for a specific product, or consulting services.