well two games on one system versus one game on two different systems, two vs. two its a fair battle. if you are talking launch week gta combined would win. but lifetime WW sales the two wii games will easily beat out the two versions of gtaIV. in fact each of those wii games may outsell gtaIV because i think it will be very front loaded and not have the legs of the previous ones since the userbase of the ps2 doesn't exist for gtaIV to just keep gobbling up sales for years.
i would guess gtaIV combining both systems will hit 15 million, with wii fit also hitting that, and mario kart maybe a million or two behind.
i think it looks like mario kart, wiifit, and brawl will probably take the top 3 spots this gen(13mil+). with mario galaxy, halo3, and call of duty4(360) taking the next 3 spots(10-11mil). gtaIV(360) and gtaIV(ps3) could be the 7th and 8th best selling games of this gen though(7-9mil). this is of course assuming there is no other beast as big as these lurking in the future.
end of '08 predictions: wii - 43 million, 360 - 25 million, ps3 - 20 million
Games I've beat recently: Super Mario Galaxy, Knights of the Old Republic, Shadow of the Collossus
Proud owner of wii, gamecube, xbox, ps2, dreamcast, n64, snes, genesis, 3DO, nes, atari, intellivision, unisonic tournament 2000, and gameboy
