That is also true for presentations which are often supported by power point slides. If you already tried to introduce a complex topic and interact with the audience you might now that the right information is always a slide away.
Why all office application re-create power point instead of thinking of more flexible concepts? I'm not really sure. Few days ago i stumbled upon Prezi which tries to goes a different route. The content is organized in a tree of topics and navigation is much more focused on context / audience and concrete situation.