Asimov's way of writing was very typewriter-centric, so maybe it's not surprising that he in particular would fail to imagine word processor-like technology:
I miss those moments I had when I was younger, reading Neuromancer, Snow Crash, and the Diamond Age for the very first time. Certainly they all played a driving role in orienting me toward what I ended up spending my life doing. The stories and the characters mattered, but the technology drowned it out.