Presentation that starts with "Noone has any idea". Saying things like "I'm the smart guy and everybody else is stupid", even if you're joking or have reasons for that, still looks... not very polite. But let's get back to the X11 talks.
There goes an interesting story of XFree86/Xorg evolution, how it looked 20 years ago and how few features it had back then, and how many features it has now, how it adopted all the modern hardware, how older extensions were replaced by their newer versions etc.
But where are the problems? Gedit startup is too slow? Then fix gedit! The rest is like "X is doing that bad, so Wayland can't do that at all" or "X does it that way, we don't like that, so Wayland does it this way" or usually it's like "Wayland is going to do it better" because it's not implemented yet or the implementation is very basic/buggy. That's all! No problems of X11 protocol or even Xorg there.
What have I missed?
BTW, it was kind of fun listening to "X isn't network-transparent any more" while running some GUI tools over ssh -Y.