updated 06:45 pm EDT, Tue June 14, 2011
iOS 5 code shows iPad 3 Retina Display still alive
New art assets found inside iOS 5 have revived hopes that Apple was making a 2048x1536 iPad display. Much like the iBooks discovery in January, backgrounds and other parts of the Twitter framework are at the extra-large resolution. The TechUnwrapped source hadn't found it anywhere else in the OS so far, though, suggesting that Apple wasn't ready to commit to releasing a sharper tablet in the near future.
Apple is widely presumed to be working on a Retina Display-like iPad screen for a model that would most likely show in early 2012. Hopes had briefly emerged that it might show for what became the iPad 2. The costs and technical realities at the time, though, ruled it out. Most current dual-core processors and mobile graphics chips only have enough power to handle roughly a 1080p display.
Samsung has hinted that a 2048x1536 iPad is at least possible. A 2560x1600 10-inch display due at the same time wouldn't be a direct match but would show that either Samsung or a rival like LG Display could cut an iPad-sized screen with a much denser resolution.