Nah. I think it'll be good. They're going to still most likely have Apple IDs attached to them and host them.I’m going to guess they’ll do notarization like they do on the Mac and apps won’t be able to update themselves, which could put the brakes on easy and frequent updates. Something about this will come with strings attached that’ll make this not really viable for anything that you wouldn’t find as a binary on GitHub.
This could open doors to plugin frameworks for desktop class apps on the iPad.