"The best way to predict the future is to invent it." So said legendary tech visionary Alan Kay. He was absolutely correct. But he might have added that inventing the future is anything but a cakewalk. Even though everyone who does it has the luxury of learning from predecessors who tried and failed.
The brightest inventors on the planet keep coming up with ideas that never amount to much -- even when they set out to solve real problems, and even when their brainchildren foreshadow later breakthroughs. And professional tech watchers have long proven themselves prone to getting irrationally exuberant about stuff that just isn't ready for prime time.
Thanks to Google Books' archives of Popular Science, Popular Mechanics, LIFE, and other magazines that frequently reported on futuristic gizmos, we have a readily accessible record of technology that failed to live up to the initial hype -- including random notions that never got off the drawing board, startlingly advanced products that didn't find a market, and very rough drafts of concepts that eventually became a big deal. The best of them are fascinating, even when it's not the least bit surprising that they flopped.
Herewith, fifteen inventions -- not that all of them ever got built -- that were at least a decade ahead of their time. They're in chronological order, starting with the inspiration that gave this article its title.
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