Well the spin game is guaranteed to ramp up. Sycophants are already laying the ground that Apple and Cook would have to accept some of the blame in any upcoming terrorist attacks. I am amazed they haven't tried the kiddie porn route yet.
Still another issue is, if they were compelled to create it they could be compelled to surrender it too. With that its a matter of weeks or months before it gets leaked to a criminal organization or country.
My long term concern is, would we ever know if they got compelled to change iOS to insert a backdoor that gets pushed to our phones. Even if we do how long before carriers are required to lock users out for not updating?