I just got done listening to Obama's speech and I have to agree with Xtra's critique.
What I thought was the most profound aspect of his speech was that it wasn’t political, it wasn't a stump speech, it wasn't a speech pandering for votes, but instead a speech that was intrinsically aspirational in its nature. He basically laid out what could be described as his national vision statement in a direct, personal, honest and straightforward manner.
It was a brilliant and inspirational speech.
Here's a link if you want to look at the transcripts or view the video.