Units
It comes up often enough that the "Library of Congress" ought to become an official metric. How big is a Library of Congress anyways?
Intel has announced the development of an integrated, end-to-end, silicon-based optical system that it says may drive down the cost of high-speed, error-free interconnects to under a dollar per port — and it leaves Chipzilla's Light Peak interconnect in the dust. "Optical as a technology is coming, and its coming very fast," …
Some standard will probably arise that uses fiber-optic cabling for data and a few copper wires for power, sort of like how 13W3 video used three coaxial cables for color channels and ten copper wires for other miscellaneous signals. This won't get rid of copper wires--just reduce how many we need and free it up for other things. (Of course, big power lines already use aluminum instead in order to save weight.)