Are you talking about the Division? Because I'm not convinced that was actual gameplay (as much as I wish it was, don't get me wrong). I think what Ubi has been doing at E3 these last couple of years is rendering up something that looks like gameplay, maybe even in-engine (at settings the real game will never achieve, at 1-2 fps and stitched together later), and then they have a guy on stage waggling a controller to the beat and pretending he's playing the game. The movement was just too perfect.
Just once, I'd like to see someone make a mistake in an Ubisoft on-stage demonstration. Bump into a tree, or get stuck on geometry or a misplaced collision box, have to back up and try again. Have to fiddle with the aim on a doorknob for a few seconds before the "Press A to open door" pops up and he can continue. Show us something that's NOT perfection, and it will help convince us that what we're seeing is real.
E3 this year should be interesting, and I think a lot more people are going to nitpick the shit out of Ubi's on-stage demonstrations, assuming they even have the balls to do any of them after this.