With some configurations, the watch face can even match the clarity and appearance of ink on paper.

ENGADGET: Phosphor's Reveal wristwatch uses Swarovski crystals to tell time, bedazzle you

The Samsung e-book displays reflect light naturally and deliver an appearance similar to that of printed paper, allowing people to read more naturally than they would with other backlit electronic paper devices.

ENGADGET: Samsung announces E6 and E10 e-book readers at CES

Paper currencies have no intrinsic value and need the appearance of worth to inspire public confidence.

ECONOMIST: The business of printing money thrives on financial crises