Apple has released the fifth TV advertisement in its “If you don’t have an iPhone” series. The new spot, entitled “Retina,” boasts about the iPhone 4’s Retina Display, “the highest resolution screen on any phone,” showing how it enhances the act of watching movies, viewing maps, reading emails, and viewing videos. As with the other ads in the series, it concludes with the announcer saying, “If you don’t have an iPhone, well, you don’t have an iPhone.” The new advertisement is available for viewing now on Apple’s website.