I know exactly what you mean, I felt the same way.See and that scene was so meh, like all scene in demo they was dead and devoid from life, i didn't see V face expression, her body language how she react on events, all that add so much immersion for me and make game so much alive, all that don't exist in FPP.
But I think (or hope) that it will feel different when we are actually "playing" instead of "watching". I also didn't get the appeal behind the hiding in Thief or the dynamic blink-skill movement in Dishonored when I watched trailers or videos.
But when you play, it feels more tangible, because it's you controlling the action. Even if the "action" sometimes is just pushing no buttons to hold still in a dark corner.