All those people must be very thin and sitting up incredibly straight if you can only see the small amount of their face in the silhouette. Also the chairs must not have any backs.
But that's just me nitpicking the technicalities. The idea is cute, but it might be too plain. The sad thing is I don't want to see the inside of the plane, though. So I think one color is the only way to go on this one, even if it does make it sort of plain.