Looking at the github pages for this

https://hellosystem.github.io/docs/

It looks really nice. Reminds me of MacOS X a bit, but I'm not complaining. I do hope to see a few new DE's hit the scene in the next few years that challenge our existing UX and UIs for Linux and operating systems in general. I feel like early Gnome 3 had some interesting features that I don't know if they're still on there or not. Like there was tight UI / DE integration to chat apps, to where you could talk around all your other active windows and then go back to what you were doing, regardless of Virtual Desktop being used at the moment.