Do you know if they're collaborating with the Sway folks? The Sway folks, via wlroots, seem to have their own protocol for surface capturing. It sounds like there is a potential for an adapter that speaks Sway on one side and Pipewire on the other side, and I'm out of my depth here, but I'm also interested in the Wayland + "screen capture/sharing" story becoming more solid, even for those of us that aren't in GNOME.