In my GTK travels last night I also discovered the broadway GTK backend. It renders GTK apps via a server in the browser. Here it is showing a quite responsive and faithful rendition of gedit. For more info check out the main developers blog: https://blogs.gnome.org/alexl/
@alcinnz Poinless but funny. Although it doesn't actually work and the HeaderBar renders strangely. It loads the page but nothing even shows up the webview.
@wezm A weird thought this brings up for me: what if I used broadway to run Odysseus, Epiphany, etc in, say, Firefox?
That'd be totally pointless.