No matter, in four years there will be much better hardware than there is now. Power consumption will be way down and graphics and processor speeds will be way up. A Wii, Xbox or PS3 will just be so not worth the trouble of plugging in. A DS or a PSP will be like a brownie 8.
The PS3 and Xbox sell best in the holiday season. But come January, Nintendo will sell WiiFit to all the fatso getting ready for summer. Parents will buy Big Brain for their kids once school lets out. The Wii keeps selling all year long. The rules of console sales have been changed; the Xbox and PS3 need to adapt. If the PS3 or the Xbox is selling well in November does not matter.