There actually is such a thing as an 8K Association which is based on the big players in the industry. The group now has passed "performance specifications" requirements for 8K televisions. Once the 8k TV complies with the requirements, they are allowed to carry a logo upon fulfillment.
8K HDTVs will be a hard sell IMHO, there's just no content let alone proper me4dia players that can handle it, the interface and yeah up to at least 75", you are just not going to see any difference due to pixel density.
The newly released tech spec includes specifications for 8K Input Parameters (bit depth, frame rate, chroma sub-sampling), Display Performance (resolution, peak brightness, black level, color gamut, white point), and the Interface & Media formats (High Dynamic Range, codec).
8K refers to the latest and highest-resolution standard for content creation, distribution and television displays that enables over 33 million pixels of resolution, which is 4 times sharper than the UHD / 4K standard. The new 8K TV specification now defined by the 8K Association includes recommended performance levels for High Dynamic Range (HDR) and Color performance along with interface requirements to help ensure consumers have confidence in their newly purchased 8K TVs. A compliance test set will be developed next by 8K Association members, thus enabling a transparent testing process. The 8KA plans to promote a logo on any member’s 8K TV that meets or exceeds the newly defined technical standard.
Along with the newly defined performance standard, the 8K Association continues its rapid growth with its broad membership having more than doubled over the past months. The organization’s newest members span video capture, television chipset technology, audio and video technology providers, and video entertainment creators—all with an eye toward efforts to promote the rapid growth of 8K content, delivery, and displays. According to data from top market researchers, the 8KA membership now includes TV brands that hold over 40% of the TV market in the United States in the 1st half of 2019 and an estimated 90% of 8K panel production to date. With such a broad representation of companies that are driving the future of the highest-resolution TVs and displays, the 8K Association expects its broad membership base to continue to work together to define and promote 8K technology standards throughout the ecosystem of content, distribution and display.
8K Association defines new requirements for 8K TVs