Matt Smith is Doctor Who...? (Preview Clip)

Why the question mark, you ask? Well, though this is just a short preview (about a minute long), I have already seen Matt Smith punch someone, hit what seems to be a Dalek with what seems to be a sledge hammer, and shoot a gun. Oh, and all while looking roughly 16-18 years old. I am happy to be rid of Russel T Davies, but this younger, overly eager Doctor just doesn't sit well with me. I guess only Spring 2010 will tell whether or not it works. Until then Matt Smith. Until then.