I think in the long run, the point that someone attempted to make but failed to deliver was that even though the Wii U is getting third party content, it's getting very little exclusive third party content. Multi-plats don't move systems. They may aid in influencing a purchasing decision once exclusives are factored in, but on their own, they're just convenient so that you can enjoy the game despite your platform choice. The Wii U is currently suffering what the Gamecube and Wii suffered: third parties don't really give a damn. They'll release content here or there, but in the long run, they know they can't compete with Nintendo's first party titles in terms of sales. At this point, apparently that means potentially not even breaking even on development costs. That's bad. Nintendo has shut out third party developers by trying to stand on their own two feet back during the days of lost third parties in the N64 era.
And before it comes up, no, fuck no, Nintendo's first party titles won't make the next Wii. They'll keep the Wii U afloat, but they won't make the Wii U a successful console. They're good games, sure, and they end up being system sellers because they're generally some of the only worthwhile games on a Nintendo system. They are no longer big system sellers though. It should be stated once more, since it could come up, that the Wii appealed to a crowd that, at the time, had few alternatives for casual gaming. That was fixed with the smart phone invasion. Phones have captured the casual market. It's something Nintendo no longer has access to. That's hurting them in other ways with the Wii U, since the Wii U seems to be having an identity crisis based on Nintendo's advertising. One day it's geared towards "hardcore gamers", the next, it's a family console meant for casual fun. Nintendo has no idea what the hell they're doing with it anymore and have basically fallen to "wait, wait, the series you've known and loved for over two decades are coming.....in 2014!" Not exactly inspiring.
This holiday season really is do or die for the Wii U. With the PS4 and the One hitting the market, Nintendo's safety window has disappeared. If the PS4 and One are a hit, the Wii U will have a lot to worry about. At best, it should be hoping for a sixth gen situation where its sales ultimately don't live up to expectations, but are decent enough to give the console game another go.