The new Descendancy view in FamilySearch.org's Family Tree opens up a world of possibilities to those who believe that "all their genealogy has been done." FamilySearch has produced a short video explaining how this view works to aid you in finding opportunities to discover cousins whose Temple work may not have been done. Here is a link to the video:
It is important to note that when an opportunity is located in the descendancy view, you should first check for duplicate entries and then verify the information contained in FamilySearch.org. There is no guarantee that the information is correct or that the ordinance work has not already been done, but by using the Descendancy View, you can certainly find family members who open up the those possibilities if you are willing to spend some time verifying the information presented.