Well if its true about Microsoft and Sony waiting till 2014, then Nintendo has at least 2 years of guaranteed 3rd party support but everyone is assuming all it means is all the PS3/Xbox 360 games are being ported over to the new Nintendo.
Nintendo did sign an exclusive agreement with Rockstar for at least 1-2 games (GTA V might be one) and with Kojima/Konami for another 1-2 games.
It also helps that Nintendo is starting to stock up on more studios as insurance if 3rd party studios decide to neglect them again.
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