Anyway, it's hard to be mild in the prediction. Either the world will collapses on itself in utter anarchy or we'll end in some sort of utopia where self-sustaining robot workforce will do all the work for us and nobody will do anything besides killing time all day long. Maybe some of us will keep doing some meaningless jobs just to stay sane, but that's it. However, for a complete replacement of human work with robots, we first need to give them strong AI and not weak AI like we have now. And making this technological leap will take decades at best.
Honestly, what should worry us the most is the transitory state. When we'll have enough cheap machines to do nearly all manual labor but no strong AIs to take care of the intellectual work. That'll lead to a society where anyone who isn't heavily qualified will be left to rot on the sideway while intelectual profession will still be healthy but under pressure for the remaining places. Too much unemployed people not to stir troubles, but not enough machines to justify the end of society as we know it (ie : getting a job, getting paid for it, living off the money we make).