Judging from the videos I have all proof I need to loudly state that this is what Blizzard does best. Flawless, so far.
As an ex-sponsored wow player (yes, guild sponsorship) who recently quit and moved back to my roots in diablo2 which in itself is a perfect game I am in shock. This is going to be the event of the century. Gothic, grim, dark, bloody & chaotic, no more of the typical kid playing the oh-so cute WoW, this is what Blizzard does best.
Three cheers for the creators of awesomeness!