Watch Dogs was announced at last years E3 and it was very well received. It's a great mix of GTA and Heavy Rain where the player is a hacker but is using his hacking skills to put things right - to some extent.
The new E3 2013 trailer for the game (below) was supposedly leaked so there is no information on the game as of yet. The trailer doesn't seem to be of any gameplay, but a mission or task of some sorts.
Ubisoft are holding their conference later today where more information will emerge about the game.