The question is, what happens when literally everything of economic value that a person is capable of doing, can be accomplish more efficiently by a machine?
From a Woody Allen standup routine in the early 1960's:
My father worked for the same firm for twelve years. They fired him. They replaced him with a tiny gadget - this big - that does everything my father does, only it does it much better. The depressing thing is, my mother ran out and bought one.