Intel Notebook "Nehalem" Info Leaked
 

Intel's next-generation notebook platform (Calpella) is scheduled to launch in the third quarter of 2009. As with other Nehalem generation products, Capella will abandon the current northbridge and southbridge chipset arrangement and transfer many typical northbridge components to the CPU package. A single integrated chipset codenamed Ibex Peak-M will coordinate other features on the motherboard, according to sources at notebook makers.

Ibex Peak-M will support Intel's next-generation notebook CPUs (Clarksfield and Auburndale), both of which include an on-die DDR3 memory controller. Auburndale will also have a graphics core integrated in the CPU package.

http://www.digitimes.com/news/a20080805PD201.html

One less chipset chip means better motherboard design and lower power usage. Add together with lower voltage / cooler running DDR3, should be a noticeable, if slight, improvement on power savings in the very least. :)

slight will be the keyword :)