http://arstechnica.com/tech-policy/2015/10/feds-apple-must-s...
""" That's because unlocking the iPhone was never about this case. It was about putting Apple in the position of unlocking every iPhone that the government will ever want unlocked now and into the future because if you do one you have no argument against doing the next one. And to make sure that all iPhones now and into the future can be unlocked. There, does that make more sense? """
That's really all this is about.... setting precedent and pushing legal events down a logical path that'll eventually lead to a judge ruling Apple must make backdoors into all future iOS versions. They have to push hard to get a favorable ruling quickly before everyone updates to the new iOS that Apple can't unlock at all. Because by then they'd have a much more difficult legal argument to make.