So just for instance, lock your phone, then take the pen out and write a phone number, then hit save, then open your phone, go into Samsung Notes and your saved note will be there, hover your S Pen over it and to the right of the number there is a phone icon, hit that and it puts that number into your phone dialler to ring out, it sound long winded but it's actually pretty neat, it also works for websites and emails, not sure what else works.
Edit, Ah I was too slow lol
With the old Air Actions, we used to be able to put in a post/Zip code and when you hovered over it there would be the map to click on, that was neat.