It's not going to stop at replacing menial jobs.
Everyone's job is at risk of being eliminated by technology, and much sooner than most people realize.
And when that happens, we'll all be on the government dole, each of us getting the same allowance from the government.
There will be no way to better oneself economically.
It will be a socialist's dream and the biggest manmade disaster in history.
It will look like North Korea eventually, because sooner or later the dole won’t be enough to feed us.
No doubt. But menial work will go first. Skilled labor like construction and such will take longer because of logistics and scale and customization.
The only reason that most cash register jobs have not been replaced already is inertia. But when your smartphone allows you to scan everything you wish to purchase and check out without talking to a single person those jobs will vanish, never to be back.
There will be a few big guys standing at the doors ready to spring if an alarm goes off and warehouse bots will restock the shelves constantly. This tech is already here and can be implemented without much work.
The guys screaming about bringing jobs back to America are in for a rude awakening because they are coming back and Rosie the Robot will be doing them all.