PAUL SOLMAN:

Sorry to see you do that.

A robot that plays Connect Four. First one to get four in a row wins. My grandkids thrash me at 10 times this speed, but after decades, as promised, robots like Baxter here are finally replacing humans at a breakneck pace.

Really?

Or so say MIT Professors Erik Brynjolfsson and Andy McAfee.

ANDREW MCAFEE, Co-author, "The Second Machine Age": Where we have always needed human beings, suddenly, we have digital alternatives to all of them that are already pretty good and getting better very, very quickly.

ERIK BRYNJOLFSSON, Co-author, "The Second Machine Age": Andy and I have been astonished at how rapidly things are happening, whether it's self-driving cars, computers that can place "Jeopardy" and beat the best champion. We are seeing a wave of technologies that can automate all sorts of cognitive tasks.