> resizing windows in X is currently "messy" and that causes "ugly output". But that will be fixed with Wayland
I wonder if the "ugly output" happens only with applications/toolkit slow to redraw a window or if this is not related?
Because Wayland will have also an issue with "slow to redraw windows": the resizing of the window will "stutter" i.e the size of the window won't follow the mouse smoothly..
I'm not sure that one is better than the other: the solution IMHO is to avoid slow redrawing with a per-window thread dedicated to the rendering like BeOS/Haiku does.