It’s currently being suggested by developers that by looking at the source code of the iOS 9 currently in beta testing, the upcoming 12.9-inch Apple iPad Pro might have a resolution of 2732×2048.
iPad Pro is 1366pt wide (so ~1006 tall)? Do the math and at 12.9" at 2X that's 263ppi, matches iPad Air… https://t.co/NyBROGR89V
— Steve T-S (@stroughtonsmith) June 15, 2015
It’s based upon the keyboard size, where set to the dimension of 1366×1024 multiplied with the retina scaling leads to the likely 2732×2048 resolution. That could give it 263 ppi, which is very close to the iPad Air 2.
The 9.7-inch iPad Air 2 has a resolution of 2048×1536, which gives it 264 ppi, while the 7.9-inch iPad mini 3 has a resolution of 2048×1536 which gives the small iPad 326 ppi.
— ヒラクチャン (@hirakujira) June 15, 2015
The previous news about the iPad Pro was that the launch had been pushed back to 2016, but that the display would feature silver nanowire technology.
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– Tom Bowen