If Assassin's Creed really was made to be played entirely with crazy gestures via the Xbox Kinect, it would be a) horrible, b) amazing or c) the cause for many, many injuries.
Probably all of the above.
Good work, fake Assassin's Creed trailer-makers! This one made me laugh out loud.
Assassin's Creed for Kinect Announced! [YouTube. Thanks, Peter!]