That article doesn't make a lot of sense. We are entering 2015 with just about all major third party support cancelled for wii u. This year the wii u will be even more a niche format and not get any of the impressive, state of the art games that ps4 or xbone get or the weaker ps3 and 360 versions.
Both ps3 and 360 are still more relevant and in mainland Europe the ps3 is still outselling wii u most of the time despite the huge existing ps3 userbase.
Nintendo are stuck with the wrong product which they must support for a few more years yet.