Every screen nowadays is optimized for (occasionally) creating and (mostly) consuming video content. Most video is 16:9. There is no other explanation. Having

Every screen nowadays is optimized for (occasionally) creating and (mostly) consuming video content. Most video is 16:9. There is no other explanation. Having a large screen is also good for watching Netflix and YouTube. For many people, the phone has almost completely replaced the TV. I guess that explains why the screens keep getting bigger.