In the old 'world of the future' exhibits they prophecized that ... all humans would enjoy more leisure time
And that was, and continues to be, the single biggest mistake of optimistic utopian predictions. Not the "more leisure time" part, mind you, but the "enjoy" part.
If you want to live at a standard set by the 1920's, you can... Living with cheap goods, no electronics, and an hourly factory job, you can meet those basic needs pretty easily. If you're working only a few hours per week to meet those minimal expenses, however, your copious leisure time will be quite boring by modern standards. Knowing what else is available, it takes quite a lot of discipline to maintain that nice simple life.
What happened to get us all to sell ourselves out so cheaply
We realized that we like advancing progress. We like our iPhones, laptops, Internet, movies, and TV shows. We like these things so much that we're still willing to work a full-time job to have them.
our children are faced with a future with no jobs and parents whose retirement funds cannot pay to take care of them?
This is the single biggest mistake of pessimistic dystopian predictions: The assumption that somehow we're sitting at the absolute maximum of progress, and the precariously balanced economy will topple down the hill on the other side.
The reality is that human nature has not changed. We always want to have the best the world can offer. If that means working just as much as our parents did for a low wage, so be it. At the end of the day, we'll still be able to go to our air-conditioned home, turn on the trillions of transistors in our gaming computers, and play a video game that runs more computations in five minutes than were executed during the entire Apollo 11 mission.
We don't have any more leisure time than we did when those "world of the future" exhibits were built. What's happened instead is that both our working and leisure time have become more effective. At work, we do in an hour what would have taken a team of people several days to accomplish, because our tools are so greatly improved. At play, we routinely spend our time doing what once would have been once-in-a-lifetime activities, because our toys are so greatly improved.
Utopia? We are living it and don't even see it