I'm No expert but quick look at wiki
Currently, in order to adhere to the UHD Premium specification in 2016 a product must firstly have a resolution of at least 3840x2160. It must be capable of displaying a 10-bit colour depth, allowing for 1,024 shades of each of the three primary colours red, green and blue, as opposed to the 256 allowed by the current 8-bit standard.