I know I could duckduckgo it, but I think we're at the stage at lemmy where there's space to ask basic questions.
What is it? Why does it matter? Users at which lunix proficiency level should care about it? Is it just yet another competing standard or is x actually going to die?
Great answers here. I'd just like to add that X and Wayland are not completing. In fact, most of the Xorg devs are the ones working on Wayland. You can find Wayland mentioned in the Xorg Foundation Website.