Natal to be included with a new 360 purchase. That is a price cut in itself. You get a new product bundled in for no additional cost. Consumers demand constant innovation and new products being introduced to the market all the time. Sony has 3D TVs and the Sony Wand in 2010. Apple has the I-Pad for 2010.
Maybe Arcade 360 could be sold without Natal for $150. Good business sense would be to leave the price unchanged with launch of Natal. Natal will receive a lot of media exposure and a huge marketing campaign to push its sales around the world. 250GB Elite replaces 120GB HDD Elite. The bigger HDDs are cheaper to manufacure than the smaller HDDs.
If Natal does not boost sales when it launches later in the year around September. November would be the time to cut prices ahead of big game releases and Xmas holiday sales period. COD 7 releases mid November and that series sells well and is extremely popular with the American consumers.