I think it would be better to visualize it in terms of a school talent contest.
Nintendo goes up and performs a dazzling magic show filled with awe and euphoria and whatnot. Nintendo's act featured quite a few new tricks and an interesting way of audience participation. Nintendo had been working on and hyping up this magic show for a long time and boy did it pay off. The crowd is ecstatic.
Sony comes on stage next and does a poor imitation of Nintendo's act that he just got finished performing. Sony was slated to perform a metal cover of Climax Blues Band's "Couldn't Get it Right" but mysteriously has a change of heart right before his turn comes up. All of a sudden he's doing magic tricks as well, and poorly. He gets one or two off by chance, but he mostly fails at each one. The crowd rightfully jeers at his lack of originality and scorn his decision to so flagrantly copy Nintendo, who had been working hard the last few months getting his act just right. Sony claims to have been working on this act for months as well, but the crowd also dismisses this because it was performed so poorly.
Neither of the contestants invented magic shows. However, Contestant Nintendo ghets high marks for pulling off a well-done shows featuring new tricks and a new method of magic. Sony gets low marks for altering his original plan to include the very same magic tricks that Nintendo just did 15 minutes ago, without aleration, and does them so poorly, that people do not notice his backup band carrying out his original plan.
The timing is the thing. It's fun to point out Nintendo had the whole idea of Camera-based games in the form of the Game Boy Camera before Sony did, but in the big scheme of things is doesn't matter very much. Nintendo pun plates in a talent show 6 years ago, Sony spun plates at a talent show 1 year ago. No biggie.
But when Sony has been heaping trash by calling Nintendo's show last year sparkling innovation (DS) while they did more of the same (PSP), and Nintendo left unfazed and continued in the same direction (controller innovation), it certainly does look bad that all of a sudden Innovation is on Sony's docket after a whole year of chiding it in the handheld sector. The timing there was awful.