Sounds cool, though I'm having a deeply frustrating facepalm moment that the folks doing graphics integration on Fedora want to work on boot glitz and not unbreaking remote desktop sharing, which still doesn't work out of the box with their Wayland setup.
Different team members work on each of these avenues of work you describe, and their effort isn't fungible.
There are patches by other desktop team members for chrom(ium), Firefox, and WebKit to work with desktop sharing using Wayland/pipewire but it takes time to get upstream to merge them into their products. Fedora 29, I believe, will be shipping with some of them applied so that even various commercial desktop streaming applications work.
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.
