Well, even that fails the test of display expert Dr. Raymond Soneira, who runs DisplayMate Technologies, which makes software to test display quality. In 2010, when the iPhone 4S was introduced, he said a display would need to have a pixel density of 477 ppi to be a "retina display" at 12 inches of viewing. He called Apple's claim "marketing puffery," not fact.
Given that, the best that can be said about the LG display is that it's considerably closer to the truth than the iPhone 4 or 4S screen. Of course, recent rumors have indicated that the iPhone 5 will sport a 5-inch screen, measured diagonally, with a different aspect ratio sure to make developers tear out their hair.
Of course, a 5-inch screen is really big. For us, something between 4- and 4.5-inches appears to be the sweet spot for a smartphone, at least. The Samsung Galaxy S III, the next so-called Android superphone, will have a 4.8-inch screen.
Aside from size, the "big" question, of course, is when. LG said that the new screen will be released in the second half of 2012. It will also be on display, starting on June 4, at the SID 2012 Display Week trade show in Boston.