You are comparing year 3 of 360 to year 2 of PS3, which isn't exactly fair. Here is a year 2.5 year graph that shows the PS3 isn't doing that badly (yet). Of course if things don't improve in the PS3's next year like they did recently for the 360, there might be a problem for the PS3...
http://vgchartz.com/hwlaunch.php?cons1=PS3®1=All&cons2=PS3®2=All&cons3=X360®3=All&weeks=132
Not saying the main chart is unfair... just that launch aligned, the PS3 is still doing ok.








