When Apple introduced the fourth generation iPhone last June, Steve Jobs made a lot of hay about the 326 pixel-per-inch density of its 960 x 640 Retina display. To date, that's the highest pixel density found on any portable device, but it may not be for long.
Casio and Toppan have a joint venture called Ortustech that has just announced a 4.8-inch diagonal display with a resolution of 1,920 x 1,080. For the mathematically challenged among us, that works out to a massive 458 ppi density, meaning that no human (at least) is likely to be complaining about being able to see individual
