The hands-on video that has recently surfaced online shows a smartwatch with slightly curved sides and bezels that seem to be a bit bigger than shown by the unofficial renders that were leaked not long ago. Sadly, there is no official launch date or a technical specs sheet to talk about yet.
https://www.notebookcheck.net/The-upcoming-OPPO-Watch-has-just-been-spotted-in-the-wild.456343.0.html