Apple filed a patent for a Notebook that has an iPod placed where usually the touch pad is.
In the context of an ultra portable notebook, where the iPod is also the hard-drive this could be a cool idea. It would be a similar concept like the Nyko Movie Player for the iPod that basically converts a iPod into a Movie Player by adding a screen.
First seen on Gear Live. More details on Macsimum News.
It could also be that this patent is as far fetched as the Sony Brain Interface, who knows.