I really don't like product design through antitrust. Consumers had a choice in more than half a dozen smartphone operating systems, and iOS (alongside Android) won, with its locked down (Apple would say safe and secure) nature being a cornerstone feature of the platform.

That said, I think this hack is really cool. I don't think an Apple sanctioned sideloading method would be the worst thing in the world, so long as its cumbersome enough to prevent companies like Facebook from circumventing the App Store to avoid Apple's pesky rules.