Blizzcon is just a convention put on by Blizzard and other related companies where people go to eat, drink, be merry, see what's new and great in their corporate worlds, sneak peeks of upcoming games, etc.

Nifty, but it's true that not everyone has the capacity to make such a trek. Oh well though. They have to offer -some- perks to people able to go. That's business, folks.