Just remember the start that the 3DS had. It was terrible.
Reasonable sales on release but quickly dropped off due to lack of compelling software (Sound familiar?)
The Wii U is just going through the same pattern because Nintendo made similar mistakes, though they said they wouldnt.
But with Pikmin 3 now out, and more big releases in the coming months we will start to see the turn around to Wii U becoming yet another iconic Nintendo Console.