In wealthy first-world countries we're already post-scarcity to a first approximation for stuff like food, clothing, and consumer electronics (I do understand that a minority of people are still desperately poor). But the stuff that people really covet will always be scarce. For example, AI can't create new real estate in prime locations.

I'm a bit of an AI pessimist, but creating new prime locations is one thing I do think AI could feasibly do. I have been involved in regeneration projects for 30 years and so many of the limiting factors could theoreticslly be eliminated by AI.