We've seen a couple of reports recently that show the Google Play Store growing very quickly in terms of revenue; and the newest report from App Annie says that Google Play's gaming revenue has finally surpassed the combined revenue of the Nintendo DS and Sony PS Vita. Of course, Google is still well behind Apple in this race. In fact, Google, Nintendo, and Sony combined couldn't match the App Store games revenue...
Source: http://www.phonearena.com/news/Google-Play-now-makes-more-in-gaming-revenue-than-Nintendo-or-Sony_id46671
Source: http://www.phonearena.com/news/Google-Play-now-makes-more-in-gaming-revenue-than-Nintendo-or-Sony_id46671