There exists an official specification of 8K TVs, which defines what should an 8K TV be capable of to receive a proper certificate. Interestingly, two major manufacturers don’t care about that.
According to information made public on the website of the association, a device certified as an 8K TV has to be able to display images in a resolution of 7680 x 4320 pixels. Sadly, it doesn’t have to be the effective resolution. Just like in the case of 4K, technologies of subpixel rendering and dithering are allowed, decreasing the effective resolution in order to make building wide angle panels easier.
An 8K TV will also have to achieve peak brightness of at least 600 nits. Overclocking the TV parameters in order to achieve it will not be allowed. 8KA will provide manufacturers with minimum requirements concerning bit color depth, framing, subsampling of chromination and black levels, which have to be present even at such screen brightness.
Good question. Especially since those aren’t small companies. We’re talking about LG, Sony, Netflix and Amazon. Some speculate, that the absence of those companies is caused by the disappointment in UHD Alliance, so the association built on similar principles and aimed towards a similar goal – promoting and standardizing 4K and HDR images.
Though we have to admit, the requirements for the official logo seem pretty sensible.