I think it was a pretty logical thing to do to migrate iPhone, iPad, and other Apple gadget questions here after the Gadgets site was closed. Why? This is the only SE site where they are on-topic.
If we go back and look at the Apple site proposal at Area 51, there is nothing there that defines this site as "OS X only" or "OS X mostly" (although it is true that the top on-topic examples are Mac/OS X ones). (Also, if Apple SE actually was "Mac / OS X only", that would mean there was no need for it in the first place, as Mac and OS X are perfectly on-topic at Super User.)
If you consider Stack Overflow, is it becoming "disjointed" with the huge influx of questions on Ruby or Python that the average C# programmer really doesn't have much interest in? By the way, Spolsky discusses the SE scope issue in the latest blog entry; interesting read.
Bottom line: if you don't care much about iOS related questions, you can easily ignore them. (You can tweak your prefs so that you don't even see those questions, if you want to.) I don't think merging in those questions does harm to the community, at least in the long run.