Nowadays Intel is focusing on performance per watt and the presentation looks pretty promising. Woodcrest and Merom will offer three times the performance per watt over their predecessors and Conroe will top this with 5x the performance/watt of its predecessor.
During the presentation there was also a slide showing the power consumption targets of Intel's upcoming 65nm processors. Server processors will consume 80W, Desktop ones 65W and sub-laptops only 5W. Normal notebooks are missing on this picture but those will feature a TDP of 35W. Then there are also a new concept called handtops which will feature 0.5W processors. The handtop appears to e a very small PC that may end up being what everyone wanted the Tablet PC to be, according to AnandTech.
On electrical cost savings alone, PC users will save $1 billion per year for every 100M computers.Check out the IDF microprocessor report at AnandTech