Here's a good article from Gamasutra about game / accessory sales -- http://www.gamasutra.com/view/news/35455/NPD_Xbox_360_Leads_In_Game_Card_OnlineCapable_Game_Sales.php
"Without specifying specific sales numbers, the graphs show the Xbox 360 selling roughly twice as many online-capable games as the PS3 in 2010, and roughly seven times as many such games as the Wii for the year."
"Retailers also sold nearly four times as many Xbox 360 digital points cards than PS3 cards in 2010, according to NPD's data, and point card sales for both systems easily outpaced those on the Wii for the year. The data doesn't take into account digital currency purchased directly through the systems themselves."
"The NPD data also unsurprisingly shows sales for motion-controlled games increasing significantly between April 2010 and April 2011, after the release of the PlayStation Move and Xbox 360 Kinect controllers."
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Simplicity is the ultimate sophistication.