No no no! The one thing that will render the tablet controller redundant as a gaming device is if a significant number of Wii U owners don't have it.
Nintendo bloody struggled to get anyone to make use of WiiMotion Plus because it only shipped with a proportion of consoles after Wii had been out for a few years.
OTOH, it would effectively make WiiU merely the WiiHD that Pachter was calling for back in 2010. So if they could price it at $199 it might sell pretty well.
“The fundamental cause of the trouble is that in the modern world the stupid are cocksure while the intelligent are full of doubt.” - Bertrand Russell
"When the power of love overcomes the love of power, the world will know peace."
Jimi Hendrix