ACTUALLY, GERARD K. O’NEILL HAD THIS IDEA BACK IN THE LAST CENTURY: Airbus’s Dream For Faster Air Travel Is Planes With Removable Cabins. Though actually, his idea was somewhat better: The nose lifts up (already done) and the cabin floor and seats slide out and into the debarkation area on rails so that passengers just stand up and exit their seats to the side with no line.

I believe this was in his 2081: A Hopeful View Of The Human Future, which was a good book, if somewhat dated now.