The 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.
“No” is a straightforward answer to “areweguiyet” in Rust. Many well intentioned and well-invested projects with no winning GUIs means we’re not there yet.
Saying “almost” or “yes” privileges the activity and hype around Rust GUI over actual results. Bevy is the ironic example: a game engine that produces more discussion and code than, so far, one notable & good game.
> There's also Bevy, a rust game engine, which, if I'm not mistaken is built on egui(?)
Not entirely correct, they have bevy_ui as the in-house example but many people use the third party bevy_egui crate