Both. Nope. It just bloats what we already have in xHTML 1.1. Sure, I can throw a header or section tag around a block, but I still have to use divs. It's just another level I need to indent at this point in time.
Let me help you count: Zero.
HTML5 is very little about e.g. the HEADER element, and much more about the underlying support for other features, such as geolocation, native sound and video, crossdomain XMLHTTPRequest, offline support and (yes,) much more.