Thats the problem with technology - 4K comes out and 8K is in testing stages and 16K is in R&D mode 
https://en.wikipedia.org/wiki/8K_resolution
From Wikipedia, the free encyclopedia 8K resolution refers to an image or display resolution with a width of approximately 8,000 pixels. 8K UHD (7680 × 4320 ) is the highest resolution defined in the Rec. 2020 ( UHDTV) standard. 8K display resolution is the next highest standard after 4K ...
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