The Boeing 787-9 Dreamliner has officially become the "sweet spot" for international travel. Balancing cutting-edge efficiency with passenger-centric perks like lower cabin altitude and dimmable windows, it’s the aircraft of choice for major U.S. carriers. But while it’s a favorite for its "anti-jet lag" engineering, production controversies and tight economy seating keep the debate flying. Is the Dreamliner truly the ultimate way to cross the ocean?