I think the the underlying game here is that epic wants to run its own app stores. It's not allowed to do that because every platform has followed Apple's model and mandated that theirs is the one and only app store on each platform.
Otherwise we end up with many app stores, which requires users to care about where they get candy crush... You can pay more or less at each store, and have different probabilities of picking up some terrible malware based on your decisions. On the flip side, we might see lots of apps using weird disallowed OS functionality in off-brand stores, leading to a second round of innovation in apps.
Realistically, it ends with many stores of varying quality and mark up. People brainwashed enough to pay the apple tax will probably continue paying the apple tax, for the most part. But the overall game changes substantially.