In addition to highlighting a new Theater Mode in watchOS 3.2, Apple yesterday announced that the upcoming software update will also enable support for Siri in third-party Apple Watch apps. As you probably know by now, the SiriKit framework made its debut in iOS 10.
It's an officially sanctioned way for developers to enrich their apps for messaging, payments, ride-booking, workouts, calling and searching photos with Siri interactions.
With SiriKit support in watchOS 3.2, developers can add spoken commands to Apple Watch apps to let users ask the personal assistant on their wrist to do things like book a ride, send a message, make a payment or accomplish other supported tasks.