The Windows edition of Assassin's Creed: Revelations is apparently delayed, and is now expected on December 2nd in Europe, a couple weeks after the console versions of the stealth/action sequel. This was found on the Czech Ubisoft Facebook page, as reported by Eurogamer by way of Eurogamer.cz.
I've just come to the realization that Ubisoft doesn't mean squat to me anymore. Not that I had cared until now... just that I don't remember when it was the last time that Ubi mattered. Ravenshield, perhaps?