Intel to Slash Energy Use by Chips - WSJ.com

tbd if/when the RT in Windows RT => redundant technology

"Intel says the fourth generation of its widely used Core line, code-named Haswell, will have greater performance, more sophisticated graphics and stronger security capabilities. But the biggest change is in power consumption, with the new chips drawing 10 watts versus 17 watts for comparable existing chips.
"Basically it means we can make devices even thinner, even lighter and with an even higher battery life while still giving a full PC experience," said Kirk Skaugen, general manager of Intel's PC client group, in an interview. "Once and for all, you will feel comfortable walking out of your house and not carrying your power brick.""

Intel to Slash Energy Use by Chips - WSJ.com