We also don't know what the context is. They said it isn't in the beta- that could either mean that the passenger seat has 3rd person view just for the beta, or that what they showed was from a campaign cutscene. Do remember that Bungie is doing a lot more "in-character" cutscenes, veering away from the full out cinematic style. That could be part of one of those scenes. We won't know until the final game, I suppose.