This Gergen review is pretty amazing:
“This was the most ambitious president we’ve heard in this chamber in decades. The first half of the speech was FDR fighting for the New Deal. The second half was Lyndon Johnson fighting for the Great Society and we have never seen those two presidents rolled together in quite this way before.”
I still can't believe how the president was able to be both grand and presidential while, at times, being personal and conversational with the room. Truly remarkable.