They are the better part of an entire decade late on this. And now they have to compete against entrenched competitors with that much more development, improvement, and network effect accumulation in their favor. To be honest, I sort of wish Nintendo would just give up making consoles and stick to making and release games for other systems.
The Wii had much success in the market without much if any online presence. Nintendo has always been precautions of online due to their younger user base, but obviously they need to be in that space. The good new for Nintendo is that its not Millions (xbox live or PSN) vs Zero, Nintendo has millions of consoles out there, and Wii U will probably sell millions of consoles as well, especially with the added value of an…
People vastly underplay the importance of cost in consoles. Family game developers will target any platform families use. An expensive WiiU will finish the job that an expensive 3DS started -- it will kill Nintendo.