Well wouldn't there be a bigger market with regular Pay-Per-View instead of only on DirectTV? Isn't that one of the things they (Blizzard) mentions when how they talk about how well so many computers can run WoW?
For like 40 bucks you can get like 8 hours a day of live coverage from the event floor for as long as BlizzCon lasts. I suppose it could be amusing for people who cant go. Oh and you get some kind of free mount in-game for ordering the PPV.