The Rise of Semantic Search

“Right now, semantic SEO is just a buzzword. However, at some point in the future, the term semantic SEO will disappear – because the only people left in the industry will be those who understand how to thrive on the semantic web. In practice, what this means is that Google knows that when you search for ‘highway’, in many cases, that means the same thing as ‘freeway’. When you search for ‘pop’, in some contexts that can mean ‘soda’, sometimes it has something to do with music, and sometimes it’s to do with balloons.”

http://www.longtailpro.com/semantic-seo-latent-semantic-indexing/