I'm looking forward to the change.
Now, let me explain this.
Wrath of the Lich King has become a boring grind and despite the number of 80's you have, you're seeing the same content as you've seen over and over again. It's going to be a great change to be able to do something on my 80's that actually benefits the character as a whole. What I mean is, as opposed to grinding heroics, running ICC, or doing dailies, I'll be able to quest! (Yay) And the quests wont be repetitive because there will be zones to see while I'm doing it. All in all, I'm personally ecstatic about Cataclysm.