Via Matt Yglesias:

[B]efore Apple launched its own iOS Maps app, Google Maps for iOS was already markedly inferior to Google Maps for Android. Not because Google was incapable of producing a great Google Maps app for iOS but because they didn’t want to make one.

To get out of that bind, Apple has never needed to make a product that’s actually superior to Google Maps. What they’ve needed to do is produce an application that clears two bars. One is that it has to be good enough that your typcial doesn’t-care-too-much phone consumer doesn’t reject iOS out of hand. The other is that it has to be good enough such that if Google doesn’t want to lose the entire iOS customer base it has to scramble and release a great Google Maps app for iOS and not just for Android. Apple’s Maps app easily clears both of those bars. Before the release of iOS 6, the inferiority of Apple’s Google-powered iOS Maps app to Android’s Google maps was a real reason to prefer an Android phone. Today, there is no such reason. Not because Apple Maps is as good at Google Maps, but because Google Maps for iOS is as good as Google Maps for Android.