Roku's remote control app gets a new update that will let you navigate and control what you want to watch on the Apple TV app right from your Apple Watch. The feature works similarly with Apple's Remote app that controls the Apple TV. The options are the same as what you'd find on the mobile app, but it's "sized for your wrist." You can also launch channels right from the Watch's screen, with channels appear in the order of most recently launched. Voice search is also available. You can issue commands such as "Launch Netflix" or "Search for Comedies." And if you're the type who loses the remote of your Roku device, the app has a "Remote finder" that will make it play an audible chime. This update, as well as the remote finder feature, will work for select Roku devices and Roku TV models.
Source: 9to5Mac