Neither Nintendo or Apple are going to go down under, that logic needs to stop
Nintendo isn't selling hot with the Wii U but do you really think they're going be useless and never make any again? Nintendo owns two of the biggest franchised games ever with Mario and Pokemon, who despite having the same formulaic game for over 20 years at least still manage to sell over 100 million units. Do you really think this one system if going to cause turmoil and bring them down. That's the dumbest thing I've heard. The money Nintendo makes from those two is immense.
Same with Apple, its revenue worldwide last year was over 100 billion. Just because of some weak products right now. Its not going at a downward spiral. Its still the best leading company in technology today. Nothing is touching apples crown anytime soon.
Nintendo and Apple are at the top of their respected core markets. One flopping product will not bring it down.