SONY will break records, take a look at its 2011 line up from SCE. Its there biggest for the PS3 by far and will push at least 3-5 million each next year so you are looking at a good 30-50 million in software sales from SCE.
So peaking well not for sony
MS will have an dark year
But Nintendo has 3DS now and will slow down Wii support so dont expect nintendo to bounce back soon.
Activison has lost Guitar hero and tony hawk are dead and COD will die soon, they need to get some new franchise's
Take Two will have GTA5 and that will sell HUGE bigger than GT4 just like GTA San Andreas, the GTA to define the console for Rockstar hopefully
Of Course That's Just My Opinion, I Could Be Wrong