The major thing that seems to be missing from most futurists minds was the pedestrian field of economics – the very basic price consciousness of consumers. They will only buy something if it’s worth the price. And most of those things they imagined were not worth it.
Take flying cars, for example. To be both a car & a plane (and probably mediocre at both). it would be very, very expensive. Both to buy, and to operate & maintain. Then there would be the insurance. Just basic collision insurance would be more, for such an expensive vehicle. And Liability insurance would be much more expensive, when a mechanical breakdown or even running out of fuel might have you crashing down on top of people, buildings, priceless art museums, etc. Plus the social worries about crazy teenage showoffs, drunk flyers, etc.
And in the end, what does it get you? Faster travel times, but how long before their would be traffic bottlenecks in the air, too. And the travel is dropping, too – with email & voice mail & treleconferencing, the need for everyone to be in the office from 9-to-5 is greatly reduced, so you can plan your travel for times when the roads aren’t jammed. And with tele-commuting, you can eliminate the travel entirely. With all that, consumers won’t pay the price for flying cars. So companies don’t make them.
Or robots. The tin-man humanoid robot could be built, but very expensively – what could it do for me that would be worth the cost? There are lots of ‘robots’ around, but they’re moastly single-function, and built into a device. You can get a robot that when you say “phone Joe” it looks up his number, dials it, and connects him – that robot is built into most cell phones. You can get a robot that reads out loud turn-by-turn directions to my destination in my car – a GPS system. You can get fancy cars with a robot built into them that remembers my preferred adjustments for my car seat, mirrors, interior temperature & even my favorite music source. And nearly all new cars come with a robot that will automatically unlock the door & turn on the lights for me. Those kinds of robots have proliferated, because people found them worth paying for. But not the tin-man robots.
So futurists, evaluate your predictions based on whether those tightwad consumers will spend their money on it!