Could you drop the "Nintendo games are for kids" nonsense? Like the second time now I've seen you knock them for it for no good reason. So the games are colorful and fun for the family, so therefor are just for kids? I love more adult games like Fallout, STALKER, Metro 2033, games that are dark and gritty and full of violence, but I also enjoy Mario and Kart Racing games. Because they are fun and entertaining.
As for the Wii U, yeah it's not doing well and probably will just manage to scrape by for a few more years. I feel like if they had initially went about things differently, it would've left them in a better place, such as the name. The Wii U is kinda confusing as a name, it very much just seemed like an addon of sorts to those that didn't know any better. It wasn't advertised well. If it had been a new name entirely, it would've helped to show that this was a new console. Combine that with poor third party support and it's just not good at all.
Funny enough, with how poor the Wii U is doing, I'm way more interested in the system than I was the Wii. I like that motion control isn't a focus, it has a proper and cool controller, it's HD, and I have more games now for the system than I did the 2 or 3 years of the Wii's life that I had one before selling it off to a friend. I'm actually backed up a bit on Wii U games lol With Smash Bros and Mario Kart 8 coming up, those are two big games. There's Bayonetta 2 and X that look awesome, the Zelda Dynasty Warriors hybrid should be fun, and I'm sure at E3 this year we'll finally get our big Zelda reveal that I've been waiting on.
And Nintendo consoles won't die off. There was an article recently where Nintendo could lose millions of dollars every year for the next 30 years and still be in business. They are much smarter about how they handle their company compared to everyone else that they won't just go the way of Sega. The 3DS for them is doing fantastically well which is a big part of their company, they are just gonna have to trudge things out for as long as they can with the Wii U, get out a few more of the big games, before they start looking to their next console that will have to probably come out quicker than the Wii U did after the Wii if they can't get out of this slump at all. The future for them does seem to be about interlinking the handheld with the console which is a good start for getting things on track, if not now, then for the next handheld and console.