Hi thanks for mentioning your project. Are there any plans to use it for automated UI testing for desktop apps? Selenium supports it (more or less) with WinAppDriver, which is another project from Microsoft.
As we build out Playwright, we hope to learn a lot about how to make automation more reliable, ergonomic, and enjoyable for developers. Ideally, we could then apply those principles/learnings to desktop, mobile, etc. automation too. Stay tuned!