Do you remember back in 2010 when the first iPad was first introduced? Back then, there werenâ€™t a whole lot of apps specifically designed for the iPad so the users had to make do with the unsatisfying iPhone apps. Why do I say unsatisfying? Because the emulation offered by Apple didnâ€™t gratify users at all. You had the option of running the app like it was still on the iPhone in a little corner using a little bit of the entire iPad screen. Or, the apps could have been extended into 2x mode. The technique was called â€œpixel doublingâ€ but the result wasnâ€™t pretty. Images and text would look annoyingly pixilated at all times.
Thatâ€™s why jailbreak mods like the RetinaPad have become increasingly popular. Interestingly, it looks like the third generation iPad owners wonâ€™t actually need this utility anymore because the new tablet already uses Retina graphics when running iPhone applications. It has thus joined the ranks of the iPhone 4 and iPhone 4S who work with a 960x640 display. The graphics are displayed both in 1x and 2x mode and the experience is highly augmented. Proof of the above statement comes via the TouchArcade forums:
â€œI just tested this with NBA Jam, which the iPhone version looked like crap on my iPad 1, but looked great through retinapad when I had it jailbroken since it was tricked into loading the iphone 4′s retina enable graphic assets. Now, on my brand spankinâ€™ new ipad third gen, it looks fantastic, without retinapad, just by enabling the 2X option at the bottom right of the screen.â€
Other tests have been performed on Instagram and Real Racing 2 iPhone apps on the iPad and it was found that they work wonderfully as well.
Source: New iPad Uses Retina Graphics When Running iPhone Apps - Mac Rumors