I’m incredibly interested in COSMIC DE! For multiple different reasons, actually.
Rust - I’m very interested to see how performant/memory-efficient this DE will be compared with other DEs. Also, I wonder how the Iced toolkit will evolve and be adopted in other projects.
Benefits over GNOME - I’m looking forward to seeing how much out-of-box customizability and features come with COSMIC over GNOME (which I’m currently using).
Maintainability going forward - Since the DE basically started from scratch and is using a much better language for robust software, I wonder how much easier and faster it would be to maintain the desktop environment. This potential improved maintainability could be huge in overtaking other DEs sometime soon.