Bag 4 finishes the fuselage and all that is left are the engines and tail section. You'll notice that this aircraft has a bathroom on board as well as some storage for a non-existent flight attendant. I think this is the first time that LEGO has put some additional details into aircraft besides just seats. Also there is only one pilot for a 2 seat cockpit in the set.
Since around 2000, the Lego Group has been promoting "Lego Serious Play", a form of business consultancy fostering creative thinking, in which team members build metaphors of their organizational identities and experiences using Lego bricks. Participants work through imaginary scenarios using visual three-dimensional Lego constructions, imaginatively exploring possibilities in a serious form of play.