First of all, wiki(s). We'll see a slight upsurge in wikis as people figure out that wiki(s) can do something regular file management can't do: tag.But then they'll flounder, as people realize that wiki(s) aren't any better than classic tree directories.
Replacing these will be shiftable hierarchies, with the most important five or so items/folders/projects taking the main space and shifting as the need arises, eventually going back down into the pile. Software that exploits this will be developed. Apples i-line of products will accelerate this.
Another meme I think you're going to see surface and hang around for a long time I like to call "Questions we forgot to ask." Here's one for the dating-relationship set: What do birth control pills do to libido?
Here's another one for the family health arena: Have studies on vaccinations and the recent increase in autism explored the possibility that fatal childhood diseases are filters for people genetically predisposed to autism? It's a logical question that begs to be asked, even as we see other illnesses on the rise such as allergies, attention deficit syndrome, and any other malady you want to blame vaccinations on, but in reverse.
And to round this set of memes up to three, there is this one: the singularity has already happened. Move over, Ray.
