NEW YORK ( TheStreet) -- Apple's ( AAPL) no-news Worldwide Developers Conference announcement of leaving Google ( GOOG) maps for its own is clearly a blow for Google, but the impact on Google's earnings may not amount to much more than a difference in rounding. iPhones account for much of mobile search with GPS, etc. (about half), and it's an valuable half. The demographics of iPhone users are coveted by advertisers for their income levels.Along with road, location and travel information provided back to Google's HAL 9000 computer system to figure out what people want, Google is able to better target ads for everyone. Apple's Steve Jobs wasn't all too pleased with Google's Android entry into the phone space, and we all know what they say about paybacks. Google has two choices and only one makes sense. Google can double down on mobile, mapping, GPS etc., and make sure the user experience is far and above the iPhone native experience. A Herculean task to be sure, which would have most competitor CEOs curling up in the fetal position under their desks. Google, a company where building a better user experience is what they eat for breakfast, has its hands full here.