This misses the main issue: while some writers did correctly anticipate some technologies, as a whole the general accuracy of predictions was very weak. Even those who did make correct predictions they were often buried in a host of other predictions. For example, some of Arthur C. Clarke's short stories have an internet like thing, but the vast majority do not. Similarly, Gibson's cyberspace only has a rough similarity to the internet as we know it. So claiming that these were anticipated seems to be almost a file drawer effect.