UPDATE: As it turns out, the wording on BlizzCon's schedule wasn't meant to be vague and misleading. In fact, it was just a mistake. Blizzard has updated the schedule to reflect the actual content of the presentation, an hour-long look at Microsoft's next-generation operating system, Vista. As 1UP predicted, the actual surprise was something less than people were freaking out about, but should provide insight into how PC gamers will be playing their games a few years from now.