Looking at the bigger picture

At IFA there was some controversy surrounding LG’s claim that Samsung’s 8K TVs are not ‘real’ 8K. On the face of it, that seems slightly ridiculous because Samsung’s TVs use panels with 7680 x 4320 pixels, which means they can obviously display a resolution of 8K.

The basis of LG’s claims are a series measurements taken using an approach called contrast modulation. This ageing metric was originally developed to measure the resolution of CRT displays, but has more recently been applied to flat panel TVs.
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https://www.avforums.com/articles/8k-or-not-8k-that-is-the-question.16767