Umm, actually the skilled factory workers (who aren't yet automated) aren't in danger - but these millions of those minimum wage service jobs are next in line to be automated; and they aren't going to be "turned into" any other jobs at all, they will be permanently unemployed.

That's the whole reason for needing drastic social changes, to figure out how to distribute resources when the raw labor of many or most of population isn't useful anymore, when paying a bare sustenance wage is more expensive than simply getting a machine to do the same thing better and faster.

Do you really think service workers can't learn new skills? We're talking about human beings here, not ants.

I think the question you need to ask - can service workers learn new skills that robots won't automate by the time they are done learning.

Robots already can partially or fully replace diagnosticians and surgeons. Those are jobs that takes one or two decade to specialize in.