What's interesting about this proposition, is that by the time you create a machine that's as capable in the way they want to replace humans, we'll have to start talking about robot personhood, because by then they will be indistinguishable from us.

I don't think you can get the kinds of robots they want without also inventing the artificial equivalent of soul. So their whole moral sidestep to reimplement slavery won't even work. Enslaving sapient beings is evil whether they are made of meat or metal.