The substance of Obama's speech was moderate liberalism -- we like business, but government has a role too, neither too much nor too little, etc. It's hard to attach that kind of case-by-case pragmatism to an overarching theme. But I do think Obama pulled it off pretty well. He took a fairly hackneyed idea -- the future -- and managed to weave it into issue after issue, from infrastructure to energy to deficits to education and even foreign policy.
I thought Obama explicated his idea about American unity better than he has in the past. The notion of unity has always sat in tension with the fierce ideological disagreement of American politics, and indeed the latter has served as a rebuke to the former. I thought Obama effectively communicated that the messiness of political debate is a part of what makes America great, to turn that into a source of pride. He simultaneouly placed himself both within and above the debate.