It looks like Toshiba has outclassed a 326 pixels-per-inch Retina Display on iPhone 4 running at a 960-by-640 pixel resolution.
Engadget spend some time with Toshiba's new display at SID 2011 with the pixel-packed display. It's one thing to read about a 367ppi screen that shows native 720p video, and it's quite another to experience it in person.
"We can report that it's, in fact, as awesome as it sounds -- onscreen images were clear, crisp, and chromatically brilliant. Pixel density enthusiasts will also be happy to hear that Toshiba confirmed the display will make it to market this year. Of course, the rep wouldn't tell us which phone will take the iPhone 4's crown as the ppi champ, though we imagine it'll be something powered by little green bots."
See it in action in the video below: