I have every intention of buying the next generation of both Xbox and PS systems, after buying the Wii and watching it collect dust for the last year (because I used my xbox/ps3) I decided that the Wii U was a toy and not worth my time. The reality is that the industry no longer expects Nintendo to play ball with the big boys when it comes to video games. Nintendo found a unique market with the release of the Wii when it came out several years ago, a more consumer friendly device that reached to a much large market segment ... it was the right place and the right time for the product that they had. Unfortunately, the market has changed, those casual gamers that used the Wii in the past are now playing with iPad's and Android tablets and are not interested in a game system that has what looks like a tablet for a game pad. The console market has once again shifted back to the gamers, so unless you have a top notch gaming system that also plays the role of a robust media center your not going to make it in that market.
Microsoft/Sony have both radically changed their products over the years into powerful gaming systems that are also dynamic media centers. For Nintendo to compete in that market they need a console that can match the xbox/PS feature to feature, and the Wii U is not that device as it barely matches the last generation of their products.
As to the Ouya, its nifty, but if I hook my Asus Transformer Infinity up to my TV via the HDMI cable I already have the device, actually I could just hook my Samsung Galaxy Nexus phone up to the TV via the HDMI cable and it would be the same as having the Ouya, it does 1080p and was released more than a year and a half ago, and its more portable. I just need to pair a Bluetooth controller too it and then what's the point, I already have an Android console system at that point.
Nintendo should give up on hardware at this point and just port its huge library of games to Xbox/PS/iOS/Android/PC and make a few billion in gams sales. Think about it, they could sell Mario Brothers for $4.99 to about 300 million phones right now.