Announced earlier today at WWDC, Apple’s watchOS 2 update for the Apple Watch will also add an Activation Lock feature, as detailed on Apple’s watchOS 2 preview page.
Similar in concept to the feature introduced in iOS 7 for the iPhone, iPad, and iPod touch, the Apple Watch implementation of Activation Lock will require that users enter their iCloud Apple ID and password to reactivate the Apple Watch after it’s been erased, acting as a theft deterrent and ensuring that user’s confidential information that may be stored on the Watch remains safe.
The introduction of the Activation Lock feature on the iPhone resulted in a measurable drop in iPhone theft rates, however a report last month lamented the lack of the important theft deterrent feature on the Apple Watch.