A potential direction for wiki is a sort of Hyper Card-like journal that benefits from federation, networking, and a wiki approach to life.
Links are made by readers not just writers. The major linking is done by readers. Like if you did a search while a person was talking about making links.
Echoes of blog post from Hapgood blog 
The connection are not just banter. It's the ultimate garden.
Then to Enter The Stream as the next movement in the symphony of the Keynote Notes
See also Don't Metaphor Me In
If I had more programming talent to invest developing a fed wiki clone (or if I had money to buy programming talent), the direction I'd want to pursue is a sort of Hyper Card-like journal that benefits from federation, networking, and a wiki approach to life.
This is an example of what Fedwiki as Memex-Journal might look like. The idea is one stream for many notes which can be occassionally refactored into separate new or exisiting sites.
A potential direction for wiki is a sort of Hyper Card-like journal that benefits from federation, networking, and a wiki approach to life.