1080P vs. 4K
What is 1080P?
The term 1080p usually assumes a widescreen aspect ratio of 16:9, implying a resolution of 1920×1080 (2.1 megapixel) often marketed as Full HD.
What is 4K?
Several 4K resolutions exist in the fields of digital television and digital cinematography. In the movie prediction industry, Digital Cinema Enterprises (DCI) is the dominant 4K standard. The DCI 4K resolution standard is defined as 4096 x 2160 pixels (256:135, approximately a 1.9:1 aspect ratio). This standard is widely respected by the film commerce along with all other DCI standards.