Thanks guys for sharing your design process, appreciate it.

For the people who've gone to grandma's on the subject…

'skeuomorph'
Oxford dictionary definition:
noun
an object or feature which imitates the design of a similar artefact in another material.

I agree with Apple's design choices regarding Calendar, Contacts, etc… many people still use a diary/address book. Mimicking these on devices makes the transition for these people much easier as they can relate to it more. Design isn't just about the way something looks, the function is also important.

Maybe the option to change the 'skin' would please the people who are more interested in fashion rather than function.