I could see this being very helpful in MDM-enabled corporate settings. We push lots of App Store apps, specifically ForeFlight for aviation users, but the user wont be logged into it until we issue it to them. ForeFlight is awesome but before you can do anything you need to download like 34-100GB of Maps and such. This would pretty much allow this iPad to be issued out nearly complete and ready to use.I can't recall the last time an app required an additional download after installing. Does anyone have any examples? The only ones I can think of are games.
Some of our other corporate internal apps could use something like this because they have DB and such which are just large enough to make them too big for Apple Store approval. Now we can use B2B and still have the user ready in time.
I would agree with you though, it only works for things that are common to majority of users to be truly helpful. Game Files, Aviation DB, Map files, etc.