- global keybindings (e.g. I would like variations on super+space with extra modifiers to trigger different behaviours in an application launcher, Kupfer)
- remote control (x2x) --- I use this for essentially seamless kvm between different machines driving adjacent monitors
- I have no choice but to use Zoom screen sharing for work
2. Check out Waypipe, it works really well and supports all application types unlike X11 forwarding. It's more like VNC but easy.
3. Last I checked Zoom screen sharing does work via the browser. The only feature I remember missing was screen control. Same experience with MS Teams too.
(Personally I don't think this is a problem: if the attacker can run programs it's game-over already; just replace "su", "sudo", "firefox", or whatnot with your wrapper script which logs stuff, add ~/.local/bin to PATH by frobbing with shell rc, and presto)
Still missing bspwm, lemonbar and dmenu (bmenu/fuzzel, maybe). For those who care, Steam is also a pain point, from what I've heard.
Games may find some benefit from gamescope: https://wiki.archlinux.org/title/Gamescope