From the article "A 4K panel of the same physical size is retina at 25 inches. An 8K panel hits that mark at the one-foot mark, but precious few people use a 3

From the article "A 4K panel of the same physical size is retina at 25 inches. An 8K panel hits that mark at the one-foot mark, but precious few people use a 32-inch display while sitting just 12 inches from the screen."