Samsung has unveiled the Exynos W920, its latest crack at a wearable chipset. The Exynos W920 is the first 5 nm SoC for wearables and supposedly offers a significant improvement in CPU and GPU performance compared to the Exynos 9110.
https://www.notebookcheck.net/Samsung-Exynos-W920-launches-as-the-first-5-nm-wearable-SoC-ahead-of-Galaxy-Watch-4-and-Galaxy-Watch-4-Classic-unveiling.554501.0.html
That's a big increase in GPU performance.
Samsung Galaxy Watch 3 is 360x360. 960x540 is quadruple the pixel count.