I have been motivated by this idea since I was a kid that if we invented machines that were created in the way that people are - were aware, have free will, inventive machines, machines that would be geniuses - potentially, they could reinvent themselves. They're not just applying it to other things - they could actually redesign themselves.
As for memes, the word 'meme' is a cliche, which is to say it's already a meme. We all hear it all the time, and maybe we even have started to use it in ordinary speech. The man who invented it was Richard Dawkins, who was, not coincidentally, an evolutionary biologist. And he invented it as an analog for the gene.
Alphabetical order had to be invented to help people organize the first dictionaries. On the other hand, we may have reached a point where alphabetical order has gone obsolete. Wikipedia is ostensibly in alphabetical order, but, when you think about it, it's not in any order at all. You use a search engine to get into it.