Since I stopped playing WoW, SC2 is the game I've been waiting for. Every other game has been a temporary fix while waiting for the next Blizzard product. Believe me I'm hoping for more companies that can compete with Blizzard in terms of fun gameplay, not to mention polish in all other aspects of the game, but that's the way it is and at least we have Blizzard.
That said, whether SC2 comes out at the end of 2009 or early 2010 I'm ok with. I got other games to check out in the meantime.