It would seem the 10x power savings will be needed very soon.

http://www.eetimes.com/document.asp?doc_id=1328218&

"In short, the global population's eagerness to get itself and everything it owns online is leading to a data explosion that is consuming 40 percent more power every year and the Internet's power demand could soon rival the world's available power resources."

"Two strategies that could delay or avoid the collapse of the Internet are mentioned in the book. One is to introduce charges or taxes levied on excessive use of the Internet to curtail use of what will effectively become a limited resource. The second is to effect a series of 10x order of magnitude changes in the way in which nanoelectronics is designed, manufactured and used."