Optimize your iPhone App for the Retina Display

The iPhone 4 Retina display packs four times as many pixels into the same size screen as earlier iPhone models. All of these additional pixels mean your apps can now display incredibly crisp images and text. While iPhone OS has built-in support for high pixel density and takes care of most of the heavy lifting, there are several opportunities for you to optimize your applications for this new display. Learn the tips and tricks to ensure your application takes full advantage of these wonderful new display capabilities.

WWDC 2010 - iOS