I can hardly wait to use Amazon App Store to install Amazon and then open up the Epic Game Store to install random game and then open up EA Game Store to install random game and then open up Facebook App Store to install Facebook and then open up the Apple App Store to install the Blizzard App Store to install Hearthstone and then go back to the Apple App Store and update the Blizzard App Store so I can get the lates…
This does mean that Apple will need to start upping their game by either lowering their fee (which means lower costs for you) or supporting other independent games that deserve attention in the App Store.
Furthermore, iOS is a well designed platform with very tight security restrictions. You don't need the App Store to do that, it's build into the platform.