I agree with some of the authors points but not with others. For example, I don't think you can say "people weren't interested in the Jetpack because it only h

I agree with some of the authors points but not with others. For example, I don't think you can say "people weren't interested in the Jetpack because it only had enough fuel for half a minute." But the future that was promised had Jetpacks that lasted longer than half a minute so that answer's kind of a cop out. That said I do agree that a lot of the "future" that these visionaries put out there was impractical. Whenever anyone talks to me about a flying car I ask them if they've ever seen someone driving around in a broken down car that obviously needs maintenance. Then I ask them to imagine what the world would be like if that unmaintained car could fall out of the sky onto their house. That alone is why I think flying cars will never be an option. Because even if you make a law that requires people to keep their flying cars maintained there will be those that will ignore it (see smog laws).