And here's another thing that will presently happen, I'm sure. People will start getting software that they can talk to and which will do the onscreen text for them. It's already out there, and it keeps getting better. It will probably replace most keyboard use eventually. Then people can agonize about young folks not being able to type anymore! ;-)

And the world will keep turning. And some people will always maintain the old skills from the past, while most people will lose them and get new ones in their place.

Here's the thing, though. Our present hi-tech system tends to specialize and greatly limit people's survival skills to a very narrow band that relates just to their job and their education (which prepares them for their job). That means if the overall system itself fails for some reason (war, natural disaster, etc), the public is in deep trouble. And that makes us more vulnerable than a relatively "primitive" culture without a lot of technology, because in those simpler cultures people still have a very broad range of ordinary survival skills. We don't. We expect someone else to do it for us.