However, there is no magical place to go, or thing to learn. It's more than just automation. Someone above the displaced workers has to want to invest in said displaced workers, since basically every option involves spending money into making a worker for another field (while less so than dedicated training, on the job training still incurs such costs). If actual costs of living remain high enough, along with government impediments (new hires aren't exactly cheap), unemployment may continue to grow, despite a workforce being available. Much of the capital that upstarts could use to help fix the problem is going elsewhere. You could manage to find some market that might be good to produce things for, but still not have any way to serve it.
They did not become useless because of automation (Chinese workers are no more or less robots than US workers). They became useless because they were discarded as producers, but still left to be consumers of the same classes of goods they used to be part of producing. When technology makes things easier, you can produce and consume more, as long as the rewards for the production increases are reinvested back into the people that were displaced by it. That hasn't been happening for a few decades now, in the US. As long as it keeps not happening, the OP's vision of the future (the present, but worse) will be seen, until we get enough civil unrest to shake things up.
Instead of a new innovation creating a situation where those with capital are thinking, "what can we do to make money with this new potential workforce," they have been thinking, "what can we make cheaper in the third world, to sell at slightly lower prices, but also slightly higher margins, to these guys who are continually making less of any real value?" Meanwhile, as wages have been stagnant, but costs have been rising, the people have been thinking, "man, I wish I could get this cheaper," instead of, "why is this all getting to hard to pay for, these days?"
Compounding this, of course, we owe other countries, and our future selves (deficit), way too much, compared to what we actually offer anyone (including our future selves).
There is no magical place to go. I know that there are things people want that we are not making yet, but I don't know what they are. If I did, I would be starting a business and hiring people. As people find ways to make stuff cheaper with less people it frees the other people up to make even more stuff, so everyone can get more stuff. The current economic climate seems to have thrown a great wrench in that though. But, there doesn't seem to be any good reason for this current economic crisis to last long term.
