The larger display of Apple Watch Series 4 allows the wearer to see more data at a glance and thanks to some new leaks you can know the exact screen resolution.
Please check the difference:
Apple Watch Series 4's display will be a thinner bezel than previous models. By increasing the extra screen real estate and the number of pixels per inch, the app developer will have more playground.
9to 5Mac excavated hidden information in the latest watchOS 5 beta, suggesting that the 42mm Apple Watch could have a screen resolution of 384 × 480. In comparison, the resolution of the Apple Watch Series 3 display is 312 × 390. At this site, it is not clear what the resolution of 38mm Apple Watch Series 4 is, but it is obviously superior to last year's model.
The developer probably needs to tune the application and check the proper scalability of the application. We have seen from Apple that we have leaked that Apple is going to pack more details into the watch. There are 9 complications on the face of the leaked Apple Watch Series 4 watch. This can cause data overload for some users.
Apple plans to announce the Apple Watch Series 4 at the September 12 event. Other features include GPS improvements, battery life extension, digital crown design changes, and more.