The horizontal as well as the vertical pixel count doubles. While the iPad 2 had a resolution of 1024 x 768, it doubles on horizontal as well as the veritical pixel count to 2048 x 1536.
From the perspective of the graphics processor designer it does not just double the problem – it quardples it. Why ? The total number of the pixels that needs to be driven by the graphics engine not only doubles – it becomes 4 times. The new graphics engine need to be 4 times as powerful as the earlier one to deliver the same level of performance at leaset as fas as the gaming graphics is concerned.
The 2012 iPad attempt to solve this problem by doubling the number of cores in the processor from 2 to 4. The newer GPU part is PowerVR SGX 543MP4 compared to the PowerVR SGX 543MP2 in iPad 2. Assuming that the performance of the GPU increases linearly with the number of the cores at the same clock speed,, this will roughly double the graphics horse power available. This is still short of the 4x performance required by the increase in the number of pixels. If a game is developed for the newer iPad to take advantage of its retina display, it is likely to give you feeling of stutter. The same game might play better when designed for the lower resolution iPad 2. You gain the quality of individual frame in the newer iPad, but you loose the graphics horse power required for moving graphics.
But the idividual images look just stunning. The increased graphics resolution leads to much better quality of the font displays which look as if carved from plastic mould even when zoomed much beyond their normal displays. This is how the “majority” of the iPad customers are going to use it and this is where Apple delivers – a stunning display , that spells charms on anyone who looks at it. It raises the bar for any contemporary Tablet manufacture.