Correction: Yes, the pinned tabs. It was stated in the Keynote that they would possess special qualities, namely, that if you clicked on a link while in one of those tabs, it would open that new link in an new tab, and in doing so, it wouldn't affect the pinned tab.
That is not happening. The pinned tab is changing on every click, and then goes back to the last page I was on when I relaunch Safari.