Here's how the resolution of the Retina Display in the iPad 3 will look compared to that of the current iDevices

  One of the almost certain things about the future iPad 3 tablet is that it will have a Retina Display with a probable resolution of 2048×1536, as I have shown you here. At the moment, there is no Mac on which a resolution in such a configuration can be displayed, although the 27-inch iMac displays a higher resolution. In these conditions we have the comparison above which shows us how the resolution of the iPad 3 tablet will look compared to that of the current iDevices but also to the 1080p resolution of most PC screens available on the market.

  At a glance, you will notice that the resolution of the iPad 3 will actually be 4 times higher than that of the iPad 2 and not double, so we will see everything as clearly as possible on the screen and the developers will have quite a lot to modify in order to makes the applications compatible with the tablet. Making a comparison with the iPhone 4 terminal, you notice that the resolution is approximately 5-6 times higher and this says a lot about how Apple developed the technology together with its partners. A whole picture you have here but if you don't have a screen with a 1080p resolution then you won't understand much.