Ultra HD TV has 3,840 x 2,160 pixels, making the resolution four times greater than standard high-definition (1,920 x 1,080). However the 4K name actually comes from UHD cinema screens with 4,096 x 2160 pixels. A constantly developing field, UHD TVs have already come a long way since their commercial unveiling in 2013. Though you may need to get a much larger screen to fully appreciate the difference, the increased spectrum of colour and resolution available is noticeable even on smaller screens.
Forget HD TV... Daniel Bennett switches on the latest 4K, Ultra HD resolution sets to find out whether it's worth upgrading your TV.