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 pixels.
The first applications for the new display are likely to be monitors for HDTV cameras and other equipment, with phones and game machines coming later. The current 4.8-inch size is definitely at the large end of the scale for a phone, so we may see a slightly smaller 720p variant of this technology in our pockets first.
[Source: New Launches via Electronista]