Ironically, I am posting this from my phone while tooling down the HOV lane on Highway 101 (I’m in the passenger seat).
WordPress was first for pure blogging, then became embraced as a CMS (though some people still deny this), is seeing growth and innovation in being used as an application platform (I think we’re about a third of the way through that), and just now starting to embrace social and mobile — the fourth phase of our evolution.