Somewhat on the late, here is the presentation on The Symbiotic Web I gave at Frontend London last November.
Have you ever wondered: is the Web a platform for Information or for Applications? Is one the “correct Web” and the other a perversion of its true purpose?
Answering this question takes us back to the roots of the Web, namely the two key concepts of URIs and links. They are what truly make the power of the Web, alongside the descriptive HTML format, for both humans and machines that use it. For humans, we tend to add visual ornaments through the presentation layer (CSS), whereas we feed machines extra information through the semantic layer (e.g. Schema.org, micro-formats, etc).
Maybe the true power of the Web is found at the intersection.