It is often said that design should be invisible. More importantly, design should empower. An interface that is not only easy to use, but fun to use, engages the user and creates an experience where obstacles are easier to overcome, and thus an experience where the product is easier and more effortless to use. Done right, skeuomorphism can retain the simplicity and ease of use of an interface while empowering users to act.
… a derivative object that retains ornamental design cues to a structure that was necessary in the original.