I know this will sound crazy, but I think Sony needs to make a bold, ground shaking move in the video game and cell phone business.
Call Nintendo. Call Iwata. Kaz Hirai is a game guy too, they can talk shop.
Look past the 3DS, give Nintendo a sweetheart deal to collaborate on a handheld platform that can be integrated into cell phones and tablets. Make it a partnership, 50-50, both sides have hardware input.
Nintendo sooner or later is going to need a partner to get into the cell/tablet business IMO. They won't do it themselves and it will be a cold day in hell before they pimp out Mario to the 99 cent iOS market. They want to retain control of hardware, licensing fees (or at least a bulk of them) ... but they will need a partner.
Look past the foolish fanboy system wars, it's 2013 now, just as Sony is now working with Panasonic (of all companies) on TVs, it's time to bring together the two Japanese game giants as well. Get to Nintendo, Sony. Before Apple or Samsung or Microsoft or Google or Disney does.
Nintendo will never go third party in a conventional sense, but I think in the next few years, the window will open where they would consider a mutually beneficial partnership, with the preference being a Japanese company that doesn't have the funds to attempt a hostile take over. Sony fits the bill and brings video game expertise to the table as well.