As for what the device will look like, Mark Gurman of 9 to 5 Mac speculates that the iPhone 4S will look a lot like the iPhone 4. "[T]he evidence for an iPhone redesign is super slim: no SDK references, no iTunes references, no hints of such a phone being in production, no sources spotting such devices. Nothing," Gurman writes. "If Apple pulls an iPhone 5 redesign out on Tuesday, it will be a major and almost unheard of surprise."
But there is word that Apple will likely incorporate improved voice control features on the new iPhone, probably with the help of an interface called Assistant. ZDNet's James Kendrick says Apple "will no doubt make Assistant very natural for the user," but he warns that the company will have to first deal with a pair of problems: the problem of background noise and the problem of preventing the user from feeling completely silly when he uses Assistant.
"Apple’s implementation of speech [recognition] will have to be done in such a way that doesn’t make the user feel self-conscious when using it," Kendrick writes. "If Apple can deal with these two hurdles, it has a shot at making speech recognition a part of the everyday use for iPhone owners. As stated, this is not new technology by any means but if Apple can get iPhone owners to use it regularly it will be a big move forward in mobile."