The KDE team has decided to finally bring to life a feature that has been long requested. This feature (which was first floated nearly 20 years ago) is geared specifically toward multi-monitor setups and will change the way the desktop works for the better. This new feature is planned for KDE Plasma 6.6 and is all about workspaces. With workspaces, you essentially get multiple desktops that you can switch between to create an efficient environment.
Wayland is the Linux graphical protocol for now and the future. At this point, there is no going back (nor is there a reason to, because Wayland is a vast improvement over X11). The migration from X11 to Wayland has been long and (at times) challenging. Fortunately, it looks as though the dust has settled and Wayland has the full support of most desktops and distributions.