<p>Craig Federighi, senior vice president of Software Engineering at Apple talks about the features of the new iOS 7 during the keynote address of the Apple Worldwide Developers Conference Monday, June 10, 2013 in San Francisco.</p><p>ERIC RISBERG ASSOCIATED PRESS</p><p>CUPERTINO, Calif. One of the best things about Apples latest iPhones is the slick new iOS 7 software that runs the devices. But that souped-up operating system could end up hurting sales because the free software upgrade will also work on iPhones released since 2010, giving owners of the older models less incentive to buy Apples newest products.</p><p>Perhaps unwittingly, even Apples software boss Craig Federighi alluded to this potential problem while he was bragging about iOS 7 at the companys unveiling of its new phones last week. He predicted that anyone who elects to install the software will feel like theyre getting an all-new device.</p><p><a href="http://www.newsobserver.com/2013/09/15/3193359/slick-ios-7-shines-on-new-iphones.html">Keep reading...</a></p>