Premium UHD is a marketing term used for TVs that offer better performance than standard UHD (4K).
These TVs usually support High Dynamic Range (HDR), Wide Color Gamut (WCG), and higher brightness levels for more realistic pictures.
For example, a Premium UHD TV makes wildlife documentaries look vibrant, with richer greens and brighter skies compared to a basic 4K TV.
See also: UHD, 4K, HDR, Wide Color Gamut