A rumour from the Asia supply chain indicates there will be a future Retina version of the 7.9-inch iPad mini tablet. This is according to Chinese-language DoNews (November 7). AUO manufactures the iPad mini display and they are apparently working on a 2,048x1,536 pixel resolution display for the next iPad mini.
The 2,048x1,536 pixel resolution is the sane resolution as the the 9.7-inch Retina display on the third- and fourth-generation iPads. Because the iPad mini has a smaller display (7.9-inches as coma red to 9.7-inches) this translates into a 300-plus pixel density (versus the iPad 4's 264 pixels per inch). Display manufacturer AUO has to pack the same number of pixels into a 7.9-inch display.
None of this should come as a big surprise because the non-Retina iPad mini is sandwiched between three Apple Retina products -- the 4-inch iPhone 5, 9.7-inch iPad, and the MacBook Pro Retina models. It is very natural for Apple to begin working on a retina iPad mini.
When the iPad mini launched, one of the most consistent criticisms was its grainy 163 pixels-per-inch display. Apple must address this shortcoming and ensure that there are retina versions of all their mobile devices.
The retina-class display aimed at the iPad mini is not likely to appear until the latter half of 2013.