Apple boss Tim Cook was in the spotlight on Tuesday, when he unveiled his first product as CEO, the iPhone 4S. Despite rumors that a completely new iPhone 5 was on deck, the tech giant launched a souped-up version of its iPhone 4, much to the annoyance of many Apple zealots. Nonetheless, the iPhone 4S has a much faster processor than its predecessor, as well as an improved camera and worldphone capabilities. Much of Tuesday's product demo in Cupertino, Calif. was taken up by "Siri" -- a sophisticated voice tool which can be used to make calls, send text messages and emails, as well as to find directions and a host of other information. Apple also added Sprint ( S) to its list of iPhone carriers, fleshed out its iOS 5 and iCloud technologies and made a handful of iPod announcements. Shares of Apple ended the week down $7.57, or 2.01%, at $369.8.