I've been frustrated with this idea for a while, but it's peaked when I read a comment that Apple TV is an iOS device. I can't shake the feeling that there are actually three versions of iOS being branded as one: Phone iOS, Tablet iOS and TV iOS. A feeling increased by the rumors of an iPad with a smaller screen and an iPhone with a bigger screen. If I'm wrong and iOS is the same on all devices isn't that a waste of space? Including all the iPad features on an iPhone simply for them to be "turned off"? Or including the new Apple TV UI on an iPad or iPhone where it's never seen or used, because iOS displays the relevant iPad and iPhone interfaces?