I will be curious if the open worldy looking sections in the game are pre-rendered.i remember being blow out of my mind at the screenshot they showed for heavy rain and then i played the game and realized those screen were from the loading screen and the gameplay was only "good" graphics but not ND level of wow.
I would point out though that Quantic Dream is incredibly talented. Their character models have generally been some of the best.
there was clearly some "rendered" assets in that trailer. i have no idea how this game plays from the trailer,.. at the very least it doesn't appear to play like a more typical QD game but i dunno. maybe the game is a visual novel and graphics are insane but it plays like a movie.