Okay, hear me out. I don't think Apple would ever bring an actual mouse pointer to the iOS user interface. I hope not-- it might bring the beach ball cursor with it. And touch isn't going to take a back seat to the mouse on that platform. But I think there's still room for a mouse. I'm talking about games.
First person shooters are so much better with a keyboard/mouse combination. Sure, they're kinda playable with a decent game controller, but us die-hards will always prefer the "WASD" keys and a trusty gaming mouse over anything else. If Apple were to think of the mouse as a game controller, they might just warm to the notion of allowing them to pair with iOS devices (as they do for keyboards).
At the same time, I think Apple would be right to reject apps that would try to require a mouse to operate. You wouldn't want to allow apps to ignore touch altogether since it's the primary input method. But as a supplemental input device, I think the mouse would work well for certain apps.
Perhaps they are working on this already... Cringely thought so. Let's hope this year's WWDC and iOS 8 has a fix for this.