Preview at WWDC likely in June, followed by September launch.
Apple Seeds Fourth iOS 8.2 Beta to Developers
The beta, build 12D5461b, is available immediately to registered developers as an over-the-air update and it can also be downloaded from the iOS Developer Center. Today's update also includes Xcode 6.2 beta 4 with WatchKit.
iOS 8.2 includes the WatchKit SDK, allowing developers to create apps, Glances, and notifications for Apple's upcoming wearable device ahead of its 2015 launch. The first iOS 8.2 beta, with WatchKit SDK and developer documentation, revealed several new details about the Apple Watch, including its heavy reliance on the iPhone and the different types of content developers can create for the device.
The iOS 8.2 update has been widely expected to be released in conjunction with the launch of the Apple Watch and the fourth iOS 8.2 beta adds new evidence to support that theory.
In the Bluetooth section of the Settings menu on the iPhone, there’s now a mention of the Apple Watch, advising users to open the "Apple Watch app" to pair an iPhone with an Apple Watch. The Apple Watch iPhone app will likely be used to allow Apple Watch wearers to control settings on the device from their iPhones.
Along with iOS 8.2, Apple is also working on a minor iOS 8.1.3 update which is in testing and could come later this week.