Now that the iPad is able to run iOS 4.2, just like the iPhone 4, why isn't there the ability to run iPhone 4 apps designed for the retina display at their native resolution (640x960?) on the iPad? This HAS to look better than pixel doubling the 320x480 display apps! I don't see any technical reason they couldn't just run them at the iPhone 4 resolution. Or is Apple preventing that so that people are urged to design specifically for the iPad?