Phones are the way of interacting with much of the world, unlike xbox or McDonalds. People consume their news using them, pay their bills, make photos of their kids, communicate with their family. It's a completely different realm.
There are two oligopolies on the market - Google (via google play) and Apple (via apple store), both are affected by the law.
Sure, and by existing laws and court rulings they haven't done anything wrong except be a preferred choice by many consumers. This is not comparable in any way to antitrust transgressions that got Microsoft in trouble, nor do they have the market share to manipulate that's comparable to what Windows or Google have had.
FWIW, I also want a more open iOS platform, but I don't think you can demonstrate that they run afoul of any existing antitrust laws or prior precedents either and trying to redefine what a monopoly means, exclusively to to the iPhone, is never going to work.
There are two oligopolies on the market - Google (via google play) and Apple (via apple store), both are affected by the law.