The way the gaming industry across all platforms is shifting focus has been addressed; it is all about how a user accesses the content on offer. PC you're talking about Steam, with the other consoles focusing on digital content as well as offering music, movies and TV and trying to shift the consoles towards home hubs.
Nintendo seems to like to take it to a whole extra level of literal interpretation and wants to be the avant garde company pushing in new directions, trying to make the user feel more involved in the experience.
In the past, a lack of third party support always seemed to be the counter-Nintendo argument. It has always been important for the Nintendo console to reach a level playing field; to offer the same multi-platform yearly IPs that other consoles do, so that it can then counter-attack with its first- and second-party games, which most agree are some of the best any company has to offer.
Keeping Kinect and PS Move aside for now, it is important to recognise that nintendo are avoiding this level playing field in other ways; by offering a different controlling experience, and by not competing on the brute force that is bellowed out by the other machines' processing numbers. It is illogical to argue that Nintendo are trying to 'win back' or 'sway' users from other consoles; to ditch those in favour of the Wii U, because Nintendo are trying to maintain a different experience rather than purely a better experience.
That's how it looks from an outsider's perspective, anyway.