iPhone's pixel density exceeds that of the human retina

Steve Jobs, the CEO of Apple, today launched iPhone 4 at the company's WWDC (Worldwide Developer Conference). One of the more remarkable features that was launched included what the company calls its 'Retina Display' - which, as it turns out, exceeds the human eye in terms of pixel density. 

The human retina can differentiate between 300 pixels per inch. However, Apple's new iPhone exceeds that with 326 pixels per inch.