Blizzard officially launches the beta.

I've been playing WoTLK on a leak server for like two-three months now.
I don't see the big deal about this.

And how could SC go to beta when there isn't even a finalized tier chart for 2/3 classes? Blizzard is taking their time with this game. The prequel was their claim to fame, they're first International blockbuster all around the world. They waited nine years to start development on a sequel for a reason, because they want this game to be the shot heard 'round the world like the first one was.