Tom's Hardware reviews Intel's upcoming 2006 Processor roadmap based on information they have obtained. According to the hardware enthusiast site, Intel is indeed aggressively reducing power consumption on high end desktop processors as well as mobile processors.
Documents seen by Tom's Hardware Guide now indicate that the new processor architecture code-named "Conroe" and scheduled for the second half of 2006 will deliver on this promise. If we believe our sources, then Intel is targeting a power consumption of about 60 to 70 watts per processor - or 30 to 35 watts per core.
Meanwhile, Intel seems to be making steady progress with their mobile "Napa" platform which will provide both single and dual core Yonah processors. These processors are expected in January of 2006. Yonah is a 65-nm dual-core mobile processor that many expect Apple to use as early as 2006.
Apple had cited energy efficiency as one of the major reasons for the switch to Intel.