I understand your fear. Your job is becoming less relevant every day. The iPhone and Android phones are coming into the enterprise with or without your help. The Blackberry user experience is horrendous relative to the modern smartphone alternatives - which are the iPhone and Android. You can get on board or get out of the way. Those are your only two options.

IT works for the business and exists solely to serve the business' wants and needs. The business provided your job and will take it away. We want iPhones and Androids, that's what we're going to get regardless of your opinion. It literally doesn't matter what you think. Your services are no longer required.