I think it matters much more for people who had to deal directly with X11; the people who write GUI frameworks and desktop environments. X11 has always been known as a buggy, poorly designed mess. It also trailed behind the needs of newer desktops forcing developers to use hacks to get new features to work on top of it. Anything that addresses those problems is an improvement. I know Wayland also made some changes for security. Desktop apps can no longer intercept input targeted at other apps when they are not in focus. That makes it more difficult for apps to interfere with each other, and to get a key logger running. The rest of us will not notice a difference until Wayland is widely supported (happening right now) and then developers will have an easier time building better software on top of it. That’s when the rest of us will see improved performance, new features, and more Linux desktop apps due to ease of development.