Wii and DS will drop the furthest.
However, when the Wii just had more sales than the 360 and the PS3 combined, a "far drop" will still put it far outselling its competition.
Additionally, it's high-sales time for Japan, and Wii Fit is coming to America and Others regions, so the drop may be the furthest, but it will be so only by a rather minor margin.
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