People think the 360 sales will go down in 2010 but the PS3 sales will peak in 2010. Systems usually peak in their third year. PS3 to peak in its fourth year would defie logic. Wii peaked in its second year and has dropped in sales.
Both systems totals will be around 10% down on 2009 sales totals. PS3 sold 13 million in 2009- it will sell only 12 million in 2010. 360 sold 10 million in 2009 it will sell only 9 million in 2010. The Wii will also follow suit and sell 10% less in 2010 than 2009.