Just because you lose a console generation, doesn't mean you didn't make money.
The Wii U will be one of the few consoles (maybe first, second or even third) Nintendo has put out in 6 home consoles that failed to make money or gain them a substantial foothold.
Sega had literally four or five before they were forced out. And unlike Sega, Nintendo is still pulling decent money from their handheld device sales and their more popular first party software on both devices. Ultimately, whether Nintendo goes hyrbid like many are expecting, full hand held or tries once more with a home console, it will depend on the company itself and what they can afford.
Probably their best bet if they go for another device might be to go all digital and try to replicate what Apple did with their digital marketplaces and the iTunes/iPod/iPhone with a mix of Steam. In Japan alone, they would still get plenty of support and if the sales are good enough, the Western developers/publishers that currently go out of their way to avoid Nintendo devices would be forced to come along as well.







