Courtesy of my friend and Alert Reader Elena O'Malley, a link to an Atlantic Monthly essay by Vannevar Bush, predicting - and suggesting plausible technical paths to - the computer, the digital camera, the Personal Data Assistant*, Internet-based research, and direct brain-computer interfaces. Published in 1945.
* Well, sort of. Bush did predict that it would be the size of a desk. Moore's Law was still 20+ years away.