> XRender is better than core X11, but is still neither good enough for modern toolkits (which are moving to OpenGL to escape the problems with XRender)
Which issue are you talking about? The speed of the rendering?
I expect that any protocol which is network efficient (WAN) will reduce the rendering speed, it's a tradeoff..
> nor as efficient as something like NeWS was.
Sure, but I don't think that it's possible to keep current toolkits and have them implement something like NeWS or Fresco/Berlin.
But current toolkits already support X11 so if there was a Wayland2.0 which was (Wayland1.0 + the useful parts of X11 to have network (WAN) access), then it should be possible to have the toolkits use this..