In this post-apocalyptic world, is the concept that humans are no longer the head of the food chain. It's not necessarily that something else has taken its place, but rather, humans are no longer the most important thing anymore. Remember, the world had survived throughout humans' self destruction and their selfishness for hundreds of years; but the introduction of AI just escalated its destruction in a matter of months.
And what's even more interesting, is that it took other AI to actually save Earth from itself.
The game has shifted from what we know as an outcome from world disaster and turned it into something else. Something more. It seems, even if it's just in this episode, we need to look back to look forward.