In addition to the weight savings that leads to fuel efficiency and reduced emissions, there are some creature comforts. The plane will be more highly pressurized (~6000 ft. altitude equivalent instead of the current ~8000 ft. equivalent) and the humidity can be higher as the potential for corrosion is greatly reduced with the new materials. Windows will be larger if you like to look out at the world around you. LED lighting throughout for better quality and energy savings. Noise reduction technologies. And much, much more!