[croes]

It's not so simple. Because Apple hardware and software are closely interwoven it's hard to change to another brand. Most of the software and accessories only works with Apple hardware and software so if you change you have to make rather large expenses to keep the previous status quo. I.e. even if you are unhappy, for some it is simply too expensive to switch to another brand.

[jwagenet]

But this is true for the game console market in the comment I originally replied to. When you buy a game you are locked in, you can't put your Halo disk in a playstation or transfer your Nintendo store purchases to Xbox. If you have an Xbox and all your friends load up on Playstation, its going to be a significant cost to get the new console and library you want to play multiplayer with them. For some reason people care more now that its a phone than a game console.