Ken Robinson's TED Talk

I assume from its position on youtube that Ken Robinson’s TED Talk is one of the most popular.
http://uk.youtube.com/watch?v=iG9CE55wbtY

I watched it a few weeks ago, and it’s an engaging and entertaining talk. I came away from it nodding my head and muttering “yes, yes”. But later that day, I found myself wondering what he was actually arguing for. If you’ve seen it (or can spare 20 mins to), could you try to make sense of his message for me?