Nintendo is watching its main console rivals hogging the gaming limelight with their GTA:SAs and Halo 2s and reaping the cash rewards and must be thinking how on earth it could have missed the point of next generation console gaming.An original and innovative company such as Nintendo however, can only plan ahead and 2005 is destined to be the year of the handheld wars. When considering raw power and marketing genius, Sony's PSP seems to have the advantage but, as far as handhelds are concerned,…