Edison vindicated [Update]

Manufacturers and energy efficiency gurus are joining forces to battle the black bricks multiplying in offices and homes, each one providing a dribble of direct current for a distinct electronic or battery-driven device. Their chosen remedy, DC power distribution, promises simpler equipment and significant energy savings. After more than a dozen beta installations worldwide, DC wiring is going commercial as manufacturers start selling the first products challenging AC power's 12θ-year dominance of electrical distribution.