I really want to disagree with Tobias Ahlin’s defense of skeuomorphism, but he does actually have a point in Skeuomorphism & Storytelling:

Skeuomorphism is about communicating and reinforcing feelings ““ getting an application to become a memorable experience, not just a tool. It’s about communicating the purpose of a UI, not only the functions it enables.

He gives some good examples of appropriate (and inappropriate) uses.