From "Google Puts Money on Robots, Using the Man Behind Android," The New York Times, 2013.12.04. Emphasis mine.
“The opportunity is massive,” said Andrew McAfee, a principal research scientist at the M.I.T. Center for Digital Business. “There are still people who walk around in factories and pick things up in distribution centers and work in the back rooms of grocery stores.”
What McAfee is saying here is totally nontrivial. All around the world and across every sector of the economy there are human beings performing menial tasks.
Until I see evidence that menial work is useful for more than building character, I'm all for ending that.