The great sleight-of-hand of the 20th century is that it never went away, we all just collectively decided to stop thinking about the fact that at every given moment for the rest of human history we'll never be more than thirty minutes away from total nuclear annihilation.

You're not kidding. I read this in the late 70s, and it's a bit of a gut punch to revisit it now, on the very day of the story, in a world where smart homes are somewhat there and nuclear saber-rattling is once again the theme of the day.

Of course, writing about the future means you won't get everything right - especially once specific dates or years enter the picture and technologies are in use that haven't been invented (or invented and discarded) yet. Nobody predicted that World War III would last as long as it has, or be so full of utter stupidity. On the technological front, film projectors are relics in this era, and film-based storage never really caught on. On the other hand, videotape wasn't around in 1950, and even audio tape was a fairly new technology.