His view of the Wii U probably changed a lot when moving from working for a big developer to being an Indie developer. When you look at what 95% of Indie games are doing, the Wii U can easily accomodate those titles. There are very few Indie developers that are actually creating games that require more power than the Wii U has. So when he was still working at Vigil, he probably thought they would be somewhat held back by the performance of the Wii U, now that he is developing in the Indie scene, where budgets and manpower are very relative, the performance is not really a concern. Most of your Indie developers will be far more concerned about Nintendo's policies and their ability to self publish than they are about the Wii U not being as powerful as the PS4. Thats the beauty of digital distribution. Even with a fairly small market, if there is the potential to sell even 25,000 copies of your game, that can be extremely profitable when cost of development is very low, and most Indie companies keep development cost pretty low. When developers are already developing thier games for tablets/smart phones, or even for Steam, if the cost to port to Wii U is inexpensive, and it should be, then it makes little sense not to bring the game to Wii U.
Nintendo's eshop is darn near as friendly as the Ouya. Nintendo's requirements are a little more strict, but thats probably a good thing, it will keep the shovelware that makes up 90% of the Apple and Android market from cluttering up the eshop. At some point more is not better. Nintendo still wants to have quality content on their eshop. Any "quality" developer that is working on games for Ouya should also be looking at the Wii U. The Wii U can run anything the Ouya can without breaking a sweat. In some ways, the Wii U could position itself to be a console that a lot of Ouya consumers upgrade to. With Nintendo striking the Unity deal, that should start to really increase the number of games coming to the eshop over the next year or so. Nintendo has made a lot of great moves for their eshop, and it seems more and more Indies are gravitating towards the platform. Now we just need the Indie market to grow to a point where its not 90% 2D side scroller games. There are a lot of genre's that have been nearly forgotten over the past 10 years, and I would love to see some small developers fill that void.
It more had to do with him making his claim based off of zero actual knowledge of the wii u hardware and simply joining in on the unfounded hearsay surrounding the system, as he completely admits.
And then, once actually having his hands on the hardware, realized he was wrong and stupid.... Which he also, openly admits.