Craze for multi faceted and multipurpose objects is a simple human psychology that many of the designers exploit to make their products more interesting and desirable. Now, you tell us that whoever thought of a keyboard with a pencil box, that is a storage utility has surely created an award winning gadget.
This design occupies an inch under the ultra thin keyboard and that surely doesn’t make it look bulky and extra space is surely something that no one would mind. So the interesting part is: while working on your PC you want a pen or pencil, a USB, or CD, simply lift the keyboard and pick it up.