If they don't move to other platforms they will be gone within five years, or less.
Current day Nintendo is a joke, overpriced slow hardware, handhelds with jagged graphics, consoles that don't come with controllers, all this mii crap and only a few quality games...
If I buy a PS4 I know I will get to play in excess of twenty or more quality games over it's lifespan, however with a WiiU the only reason I would buy it is for the less than five decent games it holds, at best! And after all that within two or three years the console has lost more than seventy percent of it's value!
Nintendo used to be a legend with their hardware and games, such as the N64 with Goldeneye, they were the industry leaders, now look at them.
It's time Nintendo concentrated on what they do best, a handful of legendary game franchises! Bring them to the platforms people ARE using and leave the hardware side of it behind... If they do this I honestly think they will make more money on just the software than they do now with software and hardware combined...
I would pay in excess of £25 for a decent Mario game on iPad and the average £55 for a decent Mario 3DWorld type game on PS and XB... so would the BILLIONS of people using those platforms!
Hopefully within the next few years Nintendo consoles will be were they belong, in the past.