The Boeing 777X is set to be much more comfortable than the previousBoeing 777-300ER second-generation aircraft. The new ‘triple-seven’ is not going to be a next-generation aircraft, so much as it will meet the conventions of the current-generation, as set by the Boeing 787 Dreamliner and the Airbus A350. The 777-9 will be the largest commercial aircraft in production, and Boeing’s new flagship jet.