Here’s the list of features Apple is promoting from watchOS 2:

• Nightstand Mode that transforms Apple Watch into a bedside alarm clock, with the Digital Crown and side button serving as snooze and off buttons for the alarm;
• the ability to use merchant rewards and store-issued credit and debit cards with Apple Pay™, which can be added to Wallet;
• support for Transit in Maps*, so you can view detailed transportation maps and schedules, including walking directions to the nearest stations with entrances and exits precisely mapped;
• workouts from third-party fitness apps contributing to your all-day Move and Exercise goals;
• using Siri® to start specific workouts, launch Glances and reply to email; and
• Activation Lock, which lets users secure their Apple Watch with their Apple ID, preventing another user from wiping or activating the device if it is lost or stolen.

All of these are incredibly exciting. But that last one, Activation Lock, might have the biggest impact. Activation Lock for Apple Watch is a big step towards eliminating the problem of Apple Watch theft before it even begins.