For the good of the industry, I want Sony (and Microsoft) to copy Nintendo when they do something right, in the same way I hope Nintendo copies them when they do something right. It's better for gaming if the companies can feed off each others' innovations.
Imagine how much it would suck right now if Sony and Microsoft were legally unable to put analog sticks in their controllers. Or, conversely, if Nintendo were barred from taking cues from Xbox Live in the design of their online system.