You hit the nail on the head. The market of mobile platforms is in a state of "market failure": no real competition, because mobile platforms are not "homogeneo

You hit the nail on the head. The market of mobile platforms is in a state of "market failure": no real competition, because mobile platforms are not "homogeneous" (that is, it's hard for a buyer to change platforms). The market of mobile platforms being thus "monopolised", you need regulation to enforce proper competition.