In Apple’s latest patent submission it has shown that there will probably be some touch sensitive buttons on the back. There are tons of possibilities for what they can do with this, but it looks like it will be for a battery indicator. We can still hope however that they will use this for some sort of media management when the computer is closed or even as a power on and off switch which will be on the outside. Personally I feel that I would like to see these buttons used for both media management as well as as a battery bar, but all that matters at this moment is what Apple wants with these touch sensitive buttons.

Sources: Gizmodo Apple Insider