I have long advocated the perfect manufacturing facility will run with one man and one dog. The man is there to feed the dog, the dog is there to keep the man away from the machines.
It has been several years since I've looked at robots in a manufacturing capacity. I would think by now the mechanicals are pretty mature technology. I would think it's more software issues that are immature and of course there is always evolving tech that has to be dealt with. I know from the late 80's and 90's to the early 2000's robot technology exploded. Robots of yesterday were dedicated machines to a single task. Robots evolved to being adaptable as manufacturing processes evolve. The Yang dude hit the nail on the head, the American factory worker is not being replaced by Hispanics, he/she is being replaced by automation. But automation still needs to be manufactured, installation, programming, maintenance, repair, etc. All of this is in the near term of course. Long term, according to the articles I W82 posted, perhaps we'll just need to determine what we're going to do with all of our free time.