This highlights one of my complaints with the trend toward skeuomorphic designs: if I've never had a physical address book, then why is my iPad trying to imitate one?
I found the iPad calendar app completely unusable for this reason. "Oh I'm meant to turn the pages, wait - is it up and down turn or left and right turn. Wait - why doesn't scroll work?"
in a similar fashion, i am having more and more problems in handwriting, and it is funny to see my Samsung android tablet offer a note taking based on handwriting.