You are focusing exclusives. AC4, NBA2K, and add in other games are the reason people want to buy 8th gen. Also BF4 is fun, not perfect but fun, and yes it is my 1st BF game I guess that makes not biased.
End of 2009 Predictions (Set, January 1st 2009)
Wii- 72 million 3rd Year Peak, better slate of releases
360- 37 million Should trend down slightly after 3rd year peak
PS3- 29 million Sales should pick up next year, 3rd year peak and price cut