I think that Nintendo`s biggest gain - or gains - will not be achieved soon but more towards the middle/end of this generation and specially the next one.
If 3DS, for example, can maintain it`s customers - which seems to be doing just fine - and still cut into PSP/Vita`s customers that could build a perception and strength in the market already in this generation but also build confidence and simpathy from both developers and customers for the next one and that is half the success already. I think the same happened with PS1>PS2, where PS1 had to make a name for itself and PS2... well, complete domination is what happened after.








