Increasing the diagonal measurement of the iPad's display from 9.7 inches to 12.9 inches while maintaining the same 4:3 aspect ratio yields a substantial increase in display area of about 40%, leading us to believe that Apple will not simply scale up the existing iPad resolution to the larger screen size. Doing so would reduce pixel density from the 132 pixels per inch (ppi) or 264 ppi Retina on the current iPad to approximately 99 ppi (198 ppi Retina), making icons and other interface elements extremely large.
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