Apple's invitation for the October 4 event announcing the new iPhone said, "Let's talk iPhone." In the past, the wording of the invitation was a clue to the major theme. So speculation is mounting that this is referring to the deep integration of speech recognition long rumored to be part of iOS 5. Last year Apple bought Siri, a leader in natural language understanding on the iPhone with their free Siri Assitant app. And Apple is rumored to be partnering with Nuance, the developer of a leading line of speech recognition products. Read more on AppleInsider. Maybe touch screens are passe. Apple has led the way in device-human interaction, first with the graphical user interface and mouse, then the touch screen. The natural and logical next step is voice.