Quite an in depth but fascinating article on the future of search.
How the Semantic Web Changes Everything for Search - Search Engine Watch
If nothing else, start thinking about the future, especially if considering some cheap SEO link building. People are regularly throwing the term "seismic changes" around, and I think they are right. But if you start to understand where it's going, then it's not that scary, and CMS systems like wordpress are rolling out structured data plugins.
If you run an ecommerce site, then you'll have the opportunity to mark up your products.
Has anyone started playing with it yet?