How the new Ocean Medallion—from the guys who created Disney’s MagicBand—will help passengers navigate Carnival Cruise Line’s busy ships. This month, the 141,000-ton Regal Princess will push out to sea after a nine-figure revamp of mind-boggling scale. Passengers won’t be greeted by new restaurants, swimming pools, or onboard activities, but will instead step into a future augured by the likes of Netflix and Uber, where nearly everything is on demand and personally tailored.