Tauri is an application framework. If you want to use Rust for your application, there's going to be one more option for rendering its UI.

This does make it closer to Electron. We'll see whether Servo can be made leaner or faster (Servo is focused on GPU-based rendering).

Long term, I dream, there could be tighter integration between Tauri and Servo's DOM, so that UI changes won't have to go through JavaScript.