People are responding to this comment by saying "Screenshots work," and yes, they do, somewhat. However, you're limited to using the screenshot tool built in to your Wayland compositor, rather than any third-party tool. For example, my favorite screenshot tool supports automatic timed screenshots, of particular windows or the whole screen or of a specified region, of one desktop or several, and various customizations. Those features aren't supported by my compositor, and I don't have a choice. So Wayland limits my options.
Another area missing functionality is remote desktop. Yes, most Wayland compositors support VNC or similar remote desktop, but without the functionality of previous solutions. For example, I used x11vnc extensively: with it, I can share just one window or a whole screen, with various security options, and I can do so programmatically from the command line. Because VNC is now a feature built into the compositor, I no longer have a choice which remote desktop tool to use, and adding features is not a priority for maintainers of the compositors.
So, while, yes technically, you're right that some analogues of screenshots and remote desktop exist on Wayland, they do so without any of the modularity and flexibility that Linux is (allegedly) proud of.