Apple may not be a competition to BB, sort of.
Unless the next iphone has NFC + Enterprise level security + Enterprise Server, there is no enterprise level competition. Now that Apple no longer makes XServe and XRaid products its fairly safe to say that they have given up on the enterprise level hardware. Furthermore, OSX server software hasn't really evolved that much (OSX server basically based on a bunch of open source server softwares bundled together, basically). Therefore, Apple making a server software similar to the BB10 Enterprise server is kind of not in the cards. Having said all that, its possible that Apple might just gobble BB and make us all rich over night.