Future Play Store apps will no longer run on Android 2.3 Gingerbread
Google explains that the Gingerbread platform is almost six years old and many developers have already stopped supporting it in their apps. By making this change, Google be able to provide a more robust collection of tools for Android developers with greater speed.
Android Gingerbread was released in December 2010. It still runs on around 1.3% of Android devices in the world. After this change, apps developed using future SDK releases after Google Play Services version 10.0.x will not be able to connect to Google Play services on Gingerbread devices. This effectively renders the platform obsolete.