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This board has a fairly large and vocal Nintendo console fanbase ... but I don't think that's indicative of the actual Nintendo fanbase that actually buys the vast majority of Nintendo hardware. The portable is vastly more popular, even the DS smoked the Wii in hardware sales and both the GameCube and Wii U generations show a lop sided 4:1 split for the handheld.
The fact is the majority of Nintendo hardware buyers find they already don't need the console.
Even without a unified library I think this was always going to be a problem for Nintendo in a way because each successive portable generation, the graphics get better and better to the point where any kind of Nintendo game should be possible on the portable next time around with relatively "nice" looking graphics. Even ambitious types of things like a big 3D Zelda or Xenoblade game will look and play great on the next Nintendo portable.
