zlacker

>>iBelie+(OP)
I worked on this stuff for Ubuntu. I think this can work pretty well for some classes of apps - browsers, chat/messaging apps, voice/video calling, terminal, contacts, gallery, music player etc - relatively light weight (at least in terms of interactions) apps.

Android/ChromeOS and iOS/MacOS are already moving to this direction for these classes of apps.

It doesn't work so well (or is more difficult to execute well, or at all) on apps with very dense UI - video editing, 3D design, IDEs, interface design apps, CAD etc

An aside - I'm not sure I'd use GTK+ for this. Why not Qt, or something like Flutter?

>>dharma+Ds
Interestingly web- or electron-based 3D, CAD and IDE apps are gaining mindshare at quite a clip.