https://www.gamespot.com/articles/apple-keynote-2018-apple-watch-4-release-date-pric/1100-6461718/

Apple has shown off the next iteration of its Apple Watch, which has been "redesigned and re-engineered." Revealed during its keynote, the company showed off the Series 4's bigger screen, which utilises a new user interface to make use of the additional real estate. We also got a release date and prices for the various models, along with the new iPhone XS, XS Max, and XR.

To make the most of the extra space, there are now new customization options for faces and Complications. The modular face can now surface more detailed information from stocks and healths apps. The Breathe app will now be available as a watch face and will guide you through a deep breath exercise when you raise your wrist. Other dynamic watch faces that interact with the larger screen and its curved edges.