Apple notified iOS developers that any updates to existing apps must now support the iPhone 4/4S 640x960 "Retina Display" resolution.
This would seem to mean that, although Rockstar is not required to ever update their existing CW app for iPhone/iPod touch, if they ever do update it for any reason, including bug fixes for compatibility with new versions of iOS, they would have to upgrade its graphics. When Rockstar released CW HD it was a separate app for the iPad and the version for iPhone/iPod touch was never updated specifically for the iPhone 4/4S. (GTA III for iOS was released as a single app that supports iPad and iPhone 4/4S.)
http://www.cultofmac.com/144981/apple-forc...on-the-way-out/