Over the last twenty years, television resolutions have improved and evolved going from Standard Definition (480i / 576i), Enhanced Definition (480p / 576p), High Definition (720p / 1080i / 1080p) to Ultra High Definition (2160p = 4K / 4320p = 8K). 4K Ultra HDTVs are television sets whose panels can natively display what is commonly known as 4K content natively. A true 4K UHDTV panel has a resolution of at least 3840x2160 individual addressable pixels.