1) Above and beyond fantasy, to the point of surrealism. (read Team Ico)
2) The best games I've ever played (read quality vs classic).
3) Nintendo makes games more for kids. Read quality vs genre or taste/segment.
Okay...Except for maybe #2 (which I cannot dispute), those traits aren't exclusively associated with Sony. So, if Nintendo were to follow your suggestions, they wouldn't be copying Sony.
Jay. The best games EYE have ever played. For anyone who understands what I see in those games, use that to ask yourself "should Nintendo try some of that?".
Well, based off what your reasoning, I disagree. I think Nintendo's style is better off not copying Sony.