That still doesn't seem autonomous in any real way though.

There are people that I could hire in the real world, give $10k (I dunno if that's enough, but you understand what I mean) and say "Do everything necessary to grow 500 bushels of corn by October", and I would have corn in October. There are no AI agents where that's even close to true. When will that be possible?

Given enough time and money the chatbots we call "AI" today could contact and pay enough people that corn would happen. At some point it'll eventually have spammed and paid the right person who would manage everything necessary themselves after the initial ask and payment. Most people would probably just pocket the cash and never respond though.