From my read this line of thought was alluded to by GP's ironic "promised land". A promised land for whom? Not for the vast majority of humankind.
Comparisons to feudalism kind of sell the direness of the AGI vision short: in feudalism, the lord still depended on the peasants. The lord would be inconvenienced if he had them all killed. Not so with AGI! He won't even notice their gone.
Exactly why I’m confused with the “techno-feudalism” point as well. What are the serfs for if they’re useless (sans some physical labor maybe?). The AGI dream is for the smallest amount of humans needed to keep the system running, and if AI can do everything feasible, then that group is basically those that “own” the AI. Techno-feudalism, if even necessary, would be a fleeting blip in the end.