One thing that was noticeable by its absence: any mention of his opponents. Mr. Obama never mentioned the name of John McCain, and he only obliquely referred to the Bush administration as the "last eight years." That's one of the hallmarks of a good ad campaign; act as if you are the only product of your kind on the market. Ad writers know that you're on shaky ground if you have to compare your product to Brand X. Don't give the consumer the chance to even subliminally be aware of the competition.
If the purpose of this massive expenditure was to reaffirm Mr. Obama's views on how to move forward in the next four years, he accomplished that very well. And I also think that he's aware of the fact that running the country won't be as easy as campaigning for the job...or making an infomercial.

