If the 'smarts' in this case are actually in the phone -that would suggest the features which set this case apart could be available for any battery case.
The only thing that's different is the iphone has some way of 'knowing' that this case is an Apple one.
I'm sure someone can make an app, possibly it would have to be a jailbreak tweak, that makes the iphone recognize all battery cases, not just the official apple one and we'd have the same 'smart' features for any case.