What IS coming soon is automation of mindless, lower-level jobs. Waiting tables is a good example here: humans do a terrible job of it, and add 10-20% to your food bill in exchange for screwing up your order. Having a tablet computer on the table for you to place your own order would be better, and some restaurants already do this (like Panera) to some degree. Factory work is another: today's factories are filled with automation, and robots produce better-quality products than humans because they don't make mistakes. Taxi driving is another: we're working on automated cars, so pretty soon "Johnny Cab" will be a real thing, and all those cab drivers will be out of a job. This will extend to truck drivers pretty quickly, probably faster than cabs actually. Fast food cooking is another: McD's already has the job of cooking a Big Mac down to something that someone with almost no training can pick up right away because their machines do most of it, they just have to follow some pictorial directions. People have Roombas to clean their floors.
So what happens when you automate all the simple jobs that don't require an education? Now you have a large portion of the population that's unemployed, and they're really not smart enough to get an education and get a higher-level job, or there's not enough higher-level jobs to go around for them if they are.
It's going to be a long time before engineers, for instance, are replaced by robots (and maybe never), but you don't need smart people to cut grass and rake leaves, and jobs like that are going to go away before long.