I'm always fascinated when reading articles like this that no one predicted general purpose or networked computers, or the implications thereof. It's always a gadget for this and a gadget for that, but never a gadget for everything that communicates instantaneously with every other gadget for everything on Earth. It speaks to the limits that the society around us places on our imagination -- these things were, quite literally, unthinkable.
Even SF authors and thinkers familiar with computer technology missed the possibility of a truly open and universally accessible networked platform. The closest I'm aware of was Jerry Pournelle's prediction that people would subscribe to 'Information Utilities'. I suppose you could argue that Google and Facebook are information utilities of a kind, but not at all in the way that he described them.
Another technology I'm not really aware of any SF authors or futurists predicting in any meaningful way is autonomous aerial drones. It now looks like these things will eventually be everywhere handling postal deliveries, emergency response and surveillance.
If you'd asked a cross section of computer technologists in the 70s how long they thought Moore's Law would last, I wonder what they'd have said.
