I do not agree that the 360 will "dominate" but I do think it will continue to see increasing sales.
I also do believe that the RPG splurge will fail hardcore in Japan where the 360 is a;ready dead.
If the 360 can regain some momemtum in late 08 it has a chance to beat the PS3 in NA this generation... A huge upset that would be.
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