Airbus and Zodiac Aerospace have partnered to develop and market lower-deck modules with passenger sleeping berths. The modules, which would fit inside the aircraft’s cargo compartments, offer new opportunities for additional services to passengers, improving their experience while enabling airlines to differentiate and add value for their commercial operations. The new passenger modules will be easily interchangeable with regular cargo containers during a typical turnaround if required. Moreover, the aircraft’s cargo floor and cargo loading system will not be affected at all, as the passenger module will sit directly on it.

So, the range of the A330Neo is so huge that sleeping facilities are required now! Lets see if this gimmick will see any airline bite the A330Neo cherry!
Check out the proposals here:
http://www.airbus.com/newsroom/press-re ... new-l.html