The release notes mentioned "Show clipboard / pasteboard history" so I hooked it up quickly to check it out.
Emacs has a "kill ring" which its super nice. I've often wondered why no one did the same thing for the normal window manager cut and paste facility. Now, someone finally has!!! Bravo!!!
It may take a while to customize it to work like I want but I predict it will come in very handy. Take for example, creating the normal web link in a typical app. It would be nice to copy the text from the source and then copy the link. Then move to the destination app and be able to paste first the text and then paste the link without flipping back and fourth two times. Now, I'll be able to do that.