We may have 3.4 billion users but creating meaningful points of engagement and maintaining relationships between users and content will be critical. The real challenge is 'relevancy' of content and how that is best achieved and realised by users through personal search agents, linked data and the injection of 'meaning' into content.
There are many barriers to learning but technology should not be one of them and the 'original' vision of the WWW was as a collaborative enviornment where you could read and write.
We need to re-focus effort on automation of processes which provide knowledge that can be discovered and searched. This will empower organisations and indivuduals; creating points of engagement through Applications which engage and retain users by enabling learning from distributed knowledge.