Many would have you believe that people "just don't want Nintendo games any more" because of the Wii U, but sales of 9.36m for Mario Kart 7, 9.35m for Super Mario 3D Land, 7.37m for New Super Mario Bros 2 show this is blatantly untrue. 3DS's 43m sales also show that "people don't want Nintendo hardware" is false as well.
The real problem is, people won't spend $300 USD to get their Nintendo fix when they can get it on 3DS for half the price.
Their libraries are too similar; why get a Wii U for 3D World or NSMBU when you can play 3D Land and NSMB2 for less? To the audience for these games, HD is simply not a big enough lure to jusify spending an extra $150.
Wii U software needs to differentiate itself from 3DS, to do things impossible on 3DS and be notably different in approach to 3DS's offerings in the same series or genre. For example, make Zelda Wii U nothing like Link Between Worlds.
