Social media is going to rule the Web until at least 2012 - according to a post by Justin Kistner, a Social Evangelist at web analytics company Webtrends. Kistner also claims that Facebook has become the king of social media. In a panel at a Portland event today called Lunch 2.0, Kistner said that the current era of the Web "is Facebook's game to lose."
Data from Google Trends suggests that the term 'web 2.0' became popular in 2005 and peaked in mid-2007 (as measured by how many times the term was entered as a search term in Google). Towards the end of 2008 'social media' started to get popular and then rose steeply in 2009.