"Twenty years ago, open source was a cause. Ten years ago, it was the underdog. Today, it sits upon the Iron Throne ruling all it surveys. Software engineers now use open source frameworks, languages, and tools in almost all projects."
I think it could be "Open Knowledge" is "next."
Same as open source has value but is not sold, "books" have value, but they still could be made open.
But those new "books" can leverage web as medium to be much more than paper books.
Wikipedia is great, and books-open (that is "creative commons") are good,
but knowledge is much more than that...
But "Open Knowledge" will likely come with some different name...
Open knowledge - Wikipedia, the free encyclopedia
"Open knowledge is knowledge that one is free to use, reuse, and redistribute without legal, social or technological restriction. Open knowledge is a set of principles and methodologies related to the production and distribution of knowledge works in an open manner. Knowledge is interpreted broadly to include data, content and general information.
The concept is related to open source and the Open Knowledge Definition is directly derived from the Open Source Definition. Open knowledge can be seen as being a superset of open data, open content and libre open access with the aim of highlighting the commonalities between these different groups."