(((interference)))
Veteran
If they would implement natal i could see them using it for maybe theater 2.0 or forge 2.0 but not for gameplay its way to competitive. Maybe a hybrid solution for gameplay like tilt head to right to lean right or hand gestures for squad members. But no natal only gameplay.
Exactly, things like motion capture for use in machinima or manipulating objects using forge. Secondary features that wouldn't affect the core gameplay but would be a talking point none the less.
Really the only reasons for Bungie to not implement some sort of Natal support would be due to the processing overhead or due to lack of time.