Here is why MK8 actually saved the Wii U-

[Experimental42]

I already wrote about this a while ago, so I'm just gonna link to it.

http://plebegaming.wordpress.com/2014/06/25/after-the-hype-mario-kart-8/

TL;DR: Mario Kart isn't the savior people made it out to be. It's a herald that comes before the turning tide.