Assassin's Creed: Unity will be released on October 28, 2014.
Announced during Ubisoft's E3 2014 press conference, the release date was accompanied by a lengthy CG trailer, featuring Lorde's cover of Everybody Wants to Rule the World, and a new gameplay demo different to the one which debuted earlier today at Microsoft's E3 2014 press conference. The demo starts with the protagonist atop a gargoyle, who bounds his way to ground level at considerable speed--movement certainly looks faster than previous games in the series. There are hundreds and hundreds of NPCs scattered around the Parisien streets, too.
Assassin's Creed: Unity will be released for PlayStation 4, Xbox One, and PC.