A new patent on iPod is "operation on the back"?

A patent about Apple's new next-generation iPod was revealed, but it seems like a previously mentionedA method of operating with a touch screenUnlike, it was a surprise content to operate with the back.

What exactly is this? Although the back of the iPod is now a mirror finish that is easily scratched, it is also worrisome whether the user is convinced that the operation using such a place is consented.

Details are as follows.
Apple: Next Gen iPod Patent Has "Touch Surface" On Back - Gizmodo

According to this article, it is not necessarily required to operate with the touch screen in this patent, after attaching the touch pad on the back, tracing it with your finger or pressing it strongly, the screen cursor moves or clicks It is possible to be able to do.

By the way, this patent seems to be adopted not only for products like iPod but also for operation interface of telephone such as iPhone.

Certainly this makes it possible to improve the operability of products like iPod nano with a small screen, and it will not be necessary to enlarge the liquid crystal so that it can be operated by touching, so consumption It may also be possible to reduce power.

For the patents of Apple this time please see the link below.

United States Patent Application: 0070103454

Is it really such an iPod?