In The Age of Em, Robin Hanson is pretty optimistic about our ability to forecast the long-term future:
Some say that there is little point in trying to foresee the non-immediate future. But in fact there have been many successful forecasts of this sort.
In the rest of this section, Hanson cites eight examples of forecasting success. Two of his examples of “success” are forecasts of technologies that haven’t arrived yet: atomically precise manufacturing and advanced starships. Another of his examples is The Year 2000:
A particularly accurate book in predicting the future was The Year 2000, a 1967 book by Herman Kahn and Anthony Wiener (Kahn and Wiener 1967). It accurately predicted population, was 80% correct for computer and communication technology, and 50% correct for other technology (Albright 2002).
As it happens, when I first read this paragraph I had already begun to evaluate the technology forecasts from The Year 2000 for the Open Philanthropy Project, relying on the same source Hanson did for determining which forecasts came true and which did not (Albright 2002).
However, my assessment of Kahn & Wiener’s forecasting performance is much less rosy than Hanson’s. For details, see here.