The minimum resolution for 4K, as defined by TV companies, is 3840x2160 pixels or 2160p. A Full HD 1080p image measures only 1920x1080 pixels. A 4K screen can show approximately 8 million pixels. This is four times the resolution of a 1080p display.This best TV guide will not show you anything less than 4K resolution. However, there might be an 8K TV that packs 33 million pixels for greater detail and a higher price.