Well, there's a possibility that they will accept bitcoin but I'm sure it will take a lot of time. Cryptocurrency market is very volatile and not regulated in other countries so this is some reason why big companies still not accepting bitcoin as means of payment.
Soon or later, i think apple will accept bitcoin. Its true that bitcoin not regulated in many country, i think its because bitcoin is decentralized cryptocurrency. But many advance country allowing bitcoin for payment. I think its just about the time when apple accepting bitcoin as currency