Android is winning for Google in a massive way once you understand their goal. Google's Android and even Chrome strategies are that _no one_ should win at the OS/platform level. They never want another Windows, or Mac, or IE, or anything that prevents them from leveraging the open web because it's fronted with proprietary code that can block them.

The best way to win at that game is to either force the market to adopt the system they can manage ("with Google" approved Android phones and the market) or make the web the only worthwhile source of truth among a hodge-podge of OSes that try to bolt on proprietary components. Even the major commercial forks of Android have not yet proved to derail this from succeeding.