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New iPad Uses Retina Graphics When Running iPhone Apps
Since the original iPad's launch, both the iPhone and iPod Touch has been upgraded to high resolution Retina displays. While Apple could use the Retina graphics from apps that had been upgraded to work with the iPhone 4 and 4S's 960x640 display (nearly all iPhone apps nowadays), so far, they've chosen not to. Instead, the iPad 1 and 2 continue to just pixel double the 480x320 display from the original iPhone's screen. In fact, there is even a jailbreak app called Retinapad that enables the use of iPhone Retina graphics on the original iPad, filling this gap in functionality.
The new iPad, however, now displays the Retina graphics of apps designed for the iPhone in both 1x and 2x mode, resulting in a significantly improved visual experience, as pointed out by a user on the TouchArcade forums. The user experience issue still exists -- in 2x mode, interface elements are twice as large -- but it looks much better .
I 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 spankin' new ipad third gen, it looks fantastic, without retinapad, just by enabling the 2X option at the bottom right of the screen.
Click to compare in full size to Native iPad version.
In this image above, the graphics of the iPhone version of Cut the Rope have been compared side-by-side on an iPad 2 (left) and iPad 3 (right). Note that while there is an iPad-native version of the app available, we used the iPhone version to illustrate the differences. The iPad 3 version uses the iPhone Retina graphics found in Cut the Rope for iPhone, resulting in a much sharper image.
In fact, the iPhone version now looks nearly identical to the iPad native version of the game:
Note that Cut the Rope HD has not yet been updated to support the iPad Retina display, so of course, native Retina iPad apps will look even better on the new iPad. In the meanwhile, iPhone apps running on the new iPad will also see a notable visual improvement, approaching previous iPad native apps.