I often wondered about that, and what the cc might do, if anyone got 'intimate' - now I know.
Are Boeing not talking about the opportunity to put bed cabins in the new supersized 747 due in a few years? They seem to be able to get more space above the main deck, behind the upper deck (wonder where they got that idea?), and have come up with all kinds of wild ideas for what it could be used for. They call it the skyloft.
See;
http://www.boeing.com/commercial/747...ackground.html