one of my son's entire home devices are apple/i. he feels he's "invested" although he's beginning to see the possibilities on android, but he's got apple right to his TVs. his wife and kids have them, too. so he's stuck in apple world.
I think this is a big thing for many people. I've been using android for over 2 years now. Even if a platform came out that seemed better (or iOS made something amazing) it would be real hard for me to switch based on how much I have I have spent on Android apps