The other thing to consider too is Wii U will be facing much more blistering competetion from PS4/X1 this year.
Neither console really has "revved" up yet, this is the year you will start to see the first really "big" PS4/X1 titles and exclusives built specifically for the system, not just games built for last-gen upscaled for "next-gen". Batman Arkham, Metal Gear Solid V, maybe Final Fantasy XV, Uncharted IV, Halo V, etc.
I think PS4 will see it's first price reduction to $349.99 this year too and MS will push the X1 down again to $299.99 for the holiday season 2015.
I think Wii U will kinda be left in the dust. So Wii U being $249.99 isn't really some game changer.
The sad thing is really the Wii U hasn't really faced "hard" competetion just yet, the PS4/X1 have been kinda just waking up and getting ready until now, that changes in 2015.