I don't think Nintendo will survive this gen. In fact I predict that
1. Wii U will place third in lifetime* sales compared to PS4/Nextbox
2. As a result of 1, Nintendo will significantly withdraw** from the home console market and focus primarily on handheld markets.
*Lifetime measured at the first sale of the first next-gen console
** significantly withdraw means business restructuring and modification (like Sega's route) or complete withdrawal.