https://www.cnbc.com/2019/02/25/sony-xperia-1-launch.html

Sony launched a series of new smartphones on Monday with super-tall screens and cinema-quality features in the hope that video creators and movie buffs can help boost its struggling mobile unit.

Sony's Xperia 10, 10 Plus and 1 smartphones come with a 21:9 aspect ratio screen, which the company said would allow users to watch videos in the same format as a movie theater. Most smartphones from companies like Apple or Samsung come with 16:9 or 18:9 aspect ratios.