personal belief- GTA series has seen it best days... it will sell really well(at least 10 million multiconsole)... but part of the hype for GTA3(VC&SA) was sony fanboys hype it to high heaven... now it is multiconsole I do not see it have the system selling affect it did last gen... it will be like SMG, won't make most people buy a console, but once they pick up that console they will be sure to get it.
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