I'm wondering if that's a viable strategy for Nintendo in the long-term; since the 3DS became a de facto upgrade path from *both* the PSP and DS, leaving the Vita by the wayside, in part due to the Monster Hunter exclusivity deal, making some smart publishing deals could perhaps have a similar effect - on a smaller scale - making the Wii U the de facto upgrade path from the PS3.
PS4 in Japan just looks dead to me. To turn things around there needs to be drastic action taken but I don't see that happening. There won't be a sudden mass intake of Japan targeted 3rd party games, just a few token releases and ports of games targeted towards the west. The other option is big games but GTA and GT are 3 years away MGS is cross platform. We'll see 1 of FF or KH next year if we're lucky and hopefully Resident Evil 7. But expect all of those 'big' games to be heavily targeted towards the west at the expense of sales in Japan.
3DS needs a price cut and some of the games(Smash, Yokai Watch 2) to somehow recover hardware sales. 50% decline YOY is bad, they need to try to cut that closer to 25%.