I noticed your top 2 games were 360 and bottom 2 were PS3 games...
I really do not see how Gears will sell more 360s. That is unless someone who loved the first one has to buy a new 360 that blew up with RROD to play it.
Res 1 was not hyped, and was not really billed as a killer ap coming out. Res 2 is getting completely different treatment... LBP is a hit or miss type game, it just depends who you ask.
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