This seems like a really big deal for mobile app developers so you guys especially need to read this.
In a nutshell, the new iPad is a mixed bag. The new iPad’s display is incredibly fine grained and web site text now appears unbelievably sharp. On the other hand, the browser experience is noticeably slower with stutters and redraws on complex web pages and web apps. Images that haven’t been updated for retina displays now appear blurry in contrast to the sharp text. iOS 5.1 doesn’t offer many new features, and it does take a step backwards. For hybrid apps (web apps packaged in a native shell), iOS 5.1 breaks localStorage and WebSQL persistence, so developers can’t rely on them anymore.