And on the other side of technology there's 3D printing. It will allow to reduce transportation of goods (only raw materials), and we already can "print" houses.

So if unemployment starts striking big time according to this article, in the same time houses will be cheap, food will be cheap...

The real question is : when nobody will have to work anymore, what people will do ? There's a big risk of population rise to the rooftop, because, you know, when you're bore...