AIs? Cyborgs?

Now, robots can create all that stuff and maintain it all. Who will it sell it to?

Even if robots can create all the stuff and then sell it, who is responsible for the entrepreneural function?

AIs? Cyborgs?

If robots take over every single jobs in the world? What will really happen?

Moreover, who will own these robots? Maybe robots become cheap enough that everyone own bots?

If we become machines, than what are robots?

Robots and machinery aren't free lunch! The automation thread is just getting started, and we have not figured out how to automate entrepreneurship yet! And even if we do, we might already become machines!

Well, first it can probably be assumed that there will be a few standard robot types. These will be cheaper to replace than to repair. One of the standard robots will be a replacer robot which can swap out all the standard robot types (including other replacer robots).

I presume that the few standard type robots can themselves be assembled by robots. Then it is simply a matter of having two (or more) robotic factories with the necessary stuff to create a robotic factory. Should one factory fail, a robotic robot will become the number 1 manufacturing priority.

Now since the robotic robot factories would become ideal targets for sabatuers and terrorists and the like, a better step would be for each robot to know how to create a robotic robot facotory built in. Then even if both robotic robot factories fail, they can team up with the nearest robots to create a new robotic robot factory.

Not really, he presents a general argument (though he uses a specific example). Basically:

Automation --> Efficiency --> More Income Somewhere --> More Jobs

You can argue that he is wrong, but he isn't relying solely on history to prove his point, he has a model in mind.