Wow there was so much to love about this scene when this footage was released.  A  mysterious man drapped with a rain coat smoking a cigarette walking at a normal gait over a rain soaked Brooklyn Bridge.  Cars with their headlight rush by, rain puddles splashing.  Suddenly the man flings his cape from his body and goes into a full on sprint.  He bungie jumps down from the bridge while triggering his cloaking mechanism.  He's invisible, but we can still see him because the rain is bouncing off his body. 

So many innovative technical things are going on in that scene and we are told this is all done realtime with the in-game engine.  So many details.  There were droplets of rain that ran down the camera lens with seemingly random paths... it made you imagine the possibilites the gameplay would introduce.