Guys you are talking nonsense for some time now.
First of all, LPCM is the purest form of sound you can get. It is THE lossless codec. I quote from wikipedia:
"There is one major uncompressed audio format, PCM, which is usually stored in a .wav file on Windows or in a .aiff file on Mac OS. The AIFF format is based on the Interchange File Format (IFF)."
So what Nintendo offered you is the possibility to hear the sound exactly like there were made, no DolbyDigital or DTS compressing bullshit. Those are losy codecs that loose sound fidelity on the way. The fact that some of us, including me, have a shitty decoder that only works with DolbyDigital (mine doesn't even have a DTS decoder) doesn't mean Nintendo tricked you in buying a Wii U. Get some money and use it wisely by buying a really good sound system...if you want quality audio. I intend to buy this one
http://www.uk.onkyo.com/en/products/tx-sr313-75901.html which supports Multichannel PCM.
Other lossless codecs are Dolby TrueHD and DTS HD Master audio but they are both compressed formats. This means that the decoding unit would have to do more work when getting that kind of codec, and ofcourse cost more money.