The term "3840x2160" refers to a display resolution commonly known as 4K or Ultra High Definition (UHD). It indicates that the screen has 3840 pixels horizontally and 2160 pixels vertically, resulting in a total of over 8 million pixels. This high resolution provides sharper images and more detail compared to lower resolutions like 1080p. 3840x2160 is widely used in various devices, including televisions, monitors, and projectors. It enhances the viewing experience for movies, video games, and other visual content, making it a popular choice for both consumers and professionals in the film and gaming industries.