Features a big, bad dragon and lots of things blowing up:
It's great to see so many familiar parts of Azeroth being rendered (and then blown up) and like the Wrath cinematic, the World of Wacraft: Cataclysm cinematic features the main plot points of the expansion's threats (world changed, Deathwing up and having breakfast).
Somehow, though, I preferred the Wrath one. This is a touch too abstract. Arthas was front and centre in the earlier cinematic, and he's a character you could get more of a grip on. Deathwing is more of a beastie, more alien to the human mind, and thus less engaging.