These three things aren't really new in web analytics nor specific to social.

And it's blatant misinformation to describe "traditional web analytics tools" as "useless" when it comes to tracking dynamic pages that don't render new pageviews. This is especially misinformed if we're talking about Google Analytics, SiteCatalyst, NetInsight, WebTrends, or just about any tool which can handle event tracking, which has been a standard feature in web analytics for years.