> didn't really increase productivity. It just did work humans were doing for less money than a human salary.

this is by definition "increasing productivity" isn't it?

> All that will happen will be again a shift away from many kinds of jobs (the easily automatible ones) to different kinds.

If that's true, then what will the shift be to? These are interesting questions. And how long will the shift take? Because I think there is a general feeling that current levels of inequality - the "hollowing out" of the middle class - are due to trends in automation.