Jobs have already disappeared due to rise in automated technology. And also... outsourcing.

People wonder why inner cities are doing so horribly, it's because at one point there were lots of factory and manufacturing jobs available in cities. And those jobs allowed for unionized work and the growth of the middle class. But now, those factories are all shut down and the labor market has shifted in a HUGE way toward the service sector. And not only that, but that service oriented job market has moved from the city to the suburbs.

The middle working class is pretty much becoming obliterated. We have a service based economy with a huuuge number of people working in service and those jobs don't actually pay a decent living wage. It's like, it used to be a pyramid, but now it's more like an hourglass (huge bottom portion, tiny middle portion, and a little bit larger but still tiny upper portion).

It's kinda not cool.

Personally, I don't need to worry because the kind of work I do can never be replaced with automated robots. Unless we're talking about super sophisticated machines which can mimick human behavior in a crazy ass fashion like the Cylons. But until that day comes, I'm pretty much safe.