Editor’s note: Sign up for Unlocking the World, CNN Travel’s weekly newsletter . Get news about destinations, plus the latest in aviation, food and drink, and where to stay. London, United Kingdom CNN  —  Traveling in a premium cabin on an Airbus A380 — AKA the world’s largest passenger aircraft , known for its low noise levels and super-spacious feel — is usually guaranteed to be a swanky affair. This luxury is set to be taken to new heights on British Airways superjumbos, as the airline just