It was obvious that the covers were not intended to represent future trends, they were often works of art that didn't even get the technology of the time correct.
Maybe modern journalists should be taking a cold look at the modern world instead of lazily looking for things to mock in the old.
For example the cell phone has mutated into a games machine that everyone on the planet appears to want to own. We don't need swipeable screens or flappy birds to build nuclear power stations or do open heart surgery. However Microsoft for one is attempting to destroy the tools that run the modern world because they don't look like the more profitable smartphone.
Let me remind you of the digital watch. They were popular for a few months in the late 70's and only exist now as novelty's. The smartphone is the same in that it will look laughably stupid in 30 years time.
Making consumer hardware is a fashion business and the only certainty is that today's fashion will be out of fashion tomorrow, remember that the next time you promote stuff in the smartphone toy market.
Meanwhile we 'almost' have Douglas Adams Hitchhikers Guide to the Galaxy from 1978. A product that accessed the entire knowledge of the galaxy, could play sound and vision, all without noticeable power needs.
Show me a poxy smartphone that doesn't need charging at the end of the day.