https://wccftech.com/galaxy-watch-4-marketing-video-shows-one-ui-watch-in-action/

Marketing videos of both the Galaxy Watch 4 and Galaxy Watch 4 Classic have leaked thanks to SamMobile. Although the videos do not show how the watches are going to look, we do get a good look at the UI design and the features of both smartwatches. Samsung is expected to launch the Galaxy Watch 4 series featuring One UI Watch on 11th August, later this year.

The leaked videos show that the Galaxy Watch 4 models are running Wear OS 3 and have the Google Play Store. This was already obvious since Samsung helped Google develop the One UI Watch and, in extension, the Wear OS 3. We also get a glimpse of some of the other Google apps on the smartwatches, including Google Maps, that you could use for navigation.