In '82, nobody had thought of a mobile 'phone. They also hadn't thought of an internet for said mobile to hook into.
its worth noting though, that William Gibson had coined 'cyberspace' in 1982's Burning Chrome two years before expanding on it in Neuromancer:
“The Matrix has its roots in primitive arcade games,' said the voice-over, 'in early graphics programs and military experimentation with cranial jacks.' On the Sony, a two-dimensional space war faded behind a forest of mathematically generated ferns, demonstrating the spatial possibilities of logarithmic spirals; cold blue military footage burned through, lab animals wired into test systems, helmets feeding into fire control circuits of tanks and war planes. 'Cyberspace. A consensual hallucination experienced daily by billions of legitimate operators, in every nation, by children being taught mathematical concepts... A graphic representation of data abstracted from the banks of every computer in the human system. Unthinkable complexity. Lines of light ranged in the nonspace of the mind, clusters and constellations of data. Like city lights, receding...”
interestingly, wiki says:
After viewing the first 20 minutes of landmark cyberpunk film Blade Runner (1982), which was released when Gibson had written a third of the novel, he "figured [Neuromancer] was sunk, done for. Everyone would assume I’d copied my visual texture from this astonishingly fine-looking film."