Is it significant that Wii U hasn't managed to nudge past NDC yet? Or have not enough hours gone by for the full effect of Wii U? Technically the price difference hasn't changed it was $50 before BF and it's $50 now. So it could be that Wii U won't go ahed of PS4 until PS4 goes back to $349 and Wii U stays at $249.
“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