I suspect that there's more reason behind iOS 7 than just for current devices. Some months back, there was speculation that Apple might be considering an iOS laptop. That, of course, would be the "golden spike" through the heart of both Windows ("Surface" and Win8) and Android/Chromebook configurations. All the apps and media would migrate seamlessly.
Apple cannot fail to have noticed the accessory keyboard market for iPads. iOS 7 in a laptop could accommodate a battery larger than the iPad - say, an 11 inch screen. Formalization of an iOS 7 laptop could fuel a major app development effort to better emulate Office, particularly for PowerPoint, the litmus test most current apps fail.