So far video applications on Linux have accessed the
hardware directly, meaning that two applications can’t
access e.g. a webcam simultaneously. Solving that
problem, and screen sharing with Wayland, were to my
understanding the main motivations for creating a video
daemon.
So screen sharing on Wayland (that covers capture use case) was one of the main motivations behind it.
If both Gnome and KDE (the most widely used DEs) are behind it, I'd say it's already a major consensus on where things are going.
If both Gnome and KDE (the most widely used DEs) are behind it, I'd say it's already a major consensus on where things are going.
Also, it looks like even wlroots has some plans to support it: https://github.com/emersion/xdg-desktop-portal-wlr
And if anyone wants to propose a better alternative, like you said, they can do it.