I think in the long run it won't matter. For the most part, the jobs they could get in the cities are starting to vanish as well. In 10-20 years, the cities will have it even worse at the lower economic end. People might as well stay where they want to live.
This economic transition will eventually effect everyone. Everyone. These people are just at the front end of it.
Why do you think this? Can you provide some evidence? There was a lot of hand wringing during the recession about the end of work--"we're all losing our jobs to the robots," etc.--but it seems like there are as many jobs as ever and more good jobs. This is especially true from a global perspective. While many blue collar workers in the US are suffering from competition from foreign substitution, there are literally billions more people joining the middle class globally. It doesn't sound like the end of human work when you zoom out.
Also, if you compare the rate of job displacement right now with technology compared to say the early 20th century where a majority of the jobs that existed 50 years prior were "destroyed", then it doesn't seem like we're at much of an inflection point.
More likely, because we have development policies that make it hard/expensive to move, we're not putting people in the new jobs like we used to--this has down the line effects of slowing growth because the workers who are also consumers aren't spending what they could have.
> It doesn't sound like the end of human work when you zoom out.
Say that in another thirty years, though. You're referring to billions of people in countries that haven't yet entered a post-industrial economic situation. Are those billions any safer than the millions in the U.S. who've fallen out of it?
This economic transition will eventually effect everyone. Everyone. These people are just at the front end of it.