These were mostly 'predictable' consequences of miniaturization in electronics and connecting computers into networks which had been happening since the late 19

These were mostly 'predictable' consequences of miniaturization in electronics and connecting computers into networks which had been happening since the late 1940s and the 1960s. And those idea didn't come out of nowhere either, science fiction invented most of those concepts long before they could be technically realised (see Star Trek's communicators).