Blizzard has unquestionably earned a place in the Valhalla of game companies. Few companies in video games' history have had the impact that Blizzard has: Warcraft, StarCraft, Diablo. World of Warcraft. Hearthstone.
And few people have had more of a formative influence on Blizzard that its chief creative officer, Rob Pardo. So it's not hyperbole to call Pardo's decision to leave Blizzard, announced today, a seismic event for the game industry.