What actually happens is that apple is forced to drop its fees, some of its restrictions to be competitive to stop the bleeding. No third party app store ends up on greater than 50-60% of phones and apps that want maximum coverage still end up on the official app store.
People like yourself who only have the official app store have little issue save maybe with fortnight.
What I'm peddling is that you don't have a right to keep vendor A from doing business with customer B on a device B purchased outright from apple in the comfort of Bs home Apple has no place there even if you think the result is virtuous.
However logically some part of the decreased fees will go to paying the developers which means they have more resources to create the apps users love and some portion will end up in the users pockets.
I can tell Apple in no uncertain terms that they will not see more of my $$$ if they let vendor A to do business with customer B as there is no way to do this without making my experience shit.
People like yourself who only have the official app store have little issue save maybe with fortnight.