In part this is influenced by the character of the man himself, which isn't full of dash and fireworks, but is more contemplative and prudent. In his acceptance speech I was struck by this phrase: We may not get there in one year or even in one term. As someone who believes in gradual change (if any change at all, since I'm of a conservative bent!) this is showing reassuring consideration.
I believe a combination of hope and pragmatism bodes well for the future.