alt Hacker NewsIronically, the use case you described is exactly the sort of thing Wayland really excels at - if you're willing to write your own compositor. There's plenty of embedded devices that ship with an extremely simple Wayland compositor that does exactly this. It opens up one app, accepts as many windows from that app as it has displays, and renders one window per display. That's that. There's no super-secret desktop that could wind up accidentally displaying if the app crashes or gets its window accidentally moved about, because there's no desktop and no moving any of the windows. You just take output from an app and put that on the display, then send input back to it.
This is great. But this doesn't cover the general expectation of a desktop application.
I want application to know the screens, send windows to know positions etc etc. And this is now compositor specific. So some applications will know how to talk to the kde compositor to share the screen, or place a window at a specific position (very useful for so many things).