alt Hacker NewsThe answer to the question posed in the site's domain name is "no", unfortunately.
It looks like it just grabbed the intro to each project's self-description, but blurbs like "Zero-cost ultra-high-performance declarative DOM library using FRP signals" would be worth very little even with screenshots.
"no" is reductive to the point of being misleading.
Cosmic DE is built using iced which is a rust gui library. As far as native, single-platform guis go, I'd say rust is plenty mature.
There's also Bevy, a rust game engine, which, if I'm not mistaken is built on egui(?), and I think supports multiple compile targets.
Between a desktop environment and a game engine, I'd say rust is in a pretty decent place when it comes to gui.