Maybe there will end up being a single app store for both Android and Apple? As a small dev, you'd only have to deal with 1 upload, a single review process, one set of user reviews, etc.
And the point of this monopoly busting legislation was to create a bigger monopoly?
Google and Apple would still be welcome to operate their own stores. A 3rd-party cross-platform store would compete with them, hence no monopoly.
Edit: I guess you read my comment to mean "Apple's app store would come to Android" or vice versa? That's a possibility. I'd prefer that to the current state of affairs where no direct competition is possible