Bleh. It was all "Oh, god, the entire Eastern Seaboard has been wiped out! It's the end of the world!" But they completely ignored the rest of the world. Basically no mention of Europe or Africa at all.
Oh, and the fact that at the end there was half the Capitol Building still sitting there and being recogniseable as such. Nothing built by humans could take an impact like that. Kinda stupid "Yeah, we're Americans! See - we're invincible!" type thing there.
I dunno - I just don't like the film, to be honest. Oh, and another thing - why did the rover things they landed on the rock with have miniguns on? Surely they wouldn't work in space (no oxygen to react with the propellant)?