Just saw Daybreakers. Nice to see vampires reacting properly to sunlight! Not a bad movie. In the story, vampirism is caused by a virus (spread through biting). I can "believe" (work with me here) that a virus could cause all the usual characteristics that vampires have, but there was one thing that must rely on a supernatural explanation that appeared in the film -- Ethan Hawk's character had no reflection in a mirror.
But anyway, I enjoyed the movie and found it to be an original take on the mythos. Seeing the everyday items redesigned for use by vampires was cool. bit bloody at the end, but watching the vampire soldiers attacking the humans, transforming to human, and then becoming victims themselves was cool too. Nice to see Jay Laga'aia make a small appearance as a vampire senator.