I agree, I think Typescript is a very good pick for UI developpement, it's easy to use yet you still have types that help with maintainability. I would definitely be using something like this to develop apps :).
However there are people who prefer other languages so it'd be nice if we could have a WebRender UI framework on which we could write bindings for any language, similarly to QT and GTK that have bindings for several languages.
This is my first rust project, so I'm not sure if I would be any help
I also think it's better to have as much GUI part as possible in typescript, try-and-refine cycle is shorter and imagine how it could be with live/hot-reload
What I'm trying to do is something like electron but lighter, faster and memory-savvy. I think it could use azul, so thanks a lot :-)