Apple’s announcement today says: “Starting February 1, 2015, new iOS apps uploaded to the App Store must include 64-bit support and be built with the iOS 8 SDK, included in Xcode 6 or later. To enable 64-bit in your project, we recommend using the default Xcode build setting of “Standard architectures” to build a single binary with both 32-bit and 64-bit code.” https://developer.apple.com/news/?id=10202014a
This is more of a FYI to folks who might need to pay attention…