To many, the Wii U is a commercial failure that came out at the wrong time, had the wrong idea and failed to compete with its direct competition. To others, the Wii U is this:
While we didn't get a Metroid, F-Zero or even an exclusive Zelda game we did get some of the best games to ever hit the industry. Donkey Kong Country: Tropical Freeze is one of the best platformers of all time, Splatoon is a fresh take on the industrys most oversaturated genre and Super Mario 3D World is fun burnt onto a disc.
Then we have the games that wouldn't have existed if it wern't for Nintendo's push and support. These are games that were doomed from the start in terms of sales but they exist because theres an audience out there who want them, no matter how small that audience may be. Bayonetta 2, Devil's Third and Project Zero: Maiden of Blackwater. These aren't games that sell a million units in a week, a month or even ever but they are important to a handful of consumers, and its really cool that they were made.
Then we have the budget games like Captain Toad: Treasure Tracker, Yoshi's Woolly World and even Splatoon. Games that focus on providing a fun time without the AAA budget. I want more of these and by the sounds of it
this will be a big part of NX's future.
The indie presense on the Wii U is also phenomenal, this isn't a full up to date list but its pretty extensive (great thread too):
http://www.neogaf.com/forum/showthread.php?t=1172907
The Wii U had its shortcomings, the hardware was limited, the third party support was close to non exsistent but it had its perks. The gamepad could truly offer an enhanced experience as demonstrated by the Zelda remasters, Zombi U, Splatoon, Star Fox Zero and Nintendo Land. Nintendo even lent their properties and partnered with third parties in the case of Pokken, Hyrule Warriors, Super Smash Bros and Wii Sports Club.
Looking back on everything the systems accomplished I'm not just happy with the Wii U, I love it. It may have only sold 13 million units but that means 13 million people bought one system to play one companies games. I think thats pretty special even if its Nintendo's worst performing system.
We've still got Tokyo Mirage Sessions #FE, Paper Mario Colour Splash and The Legend of Zelda to come and while thats a very small lineup they all offer something unique and special to further diversify this fantastic library. I'm all for a fresh start with NX, but the Wii U is not a failure to me. I've had so much fun with this little box.