BBB Geek-toid

Surely we all remember "magic slates" or "mystic writing pads" - consisting of a thin sheet of clear plastic over a gray sheet above a waxen board. The tip of a stylus presses through the sheets of plastic and makes a faint indentation in the wax below which appears as a dark trace on the gray sheet. When the sheet is lifted away from the surface of the waxen tablet beneath, the dark traces disappear; the pad is clean again.

So, wouldn't it be cool if there was an electronic version of the magic slate? Or even better, something lighter and more versatile - like paper? Enter Electronic Reusable Paper.