It's funny how supposedly 360 only succeed because it was 1 year earlier, and all Sony mistakes, and how Wii U was absolutely incapable to do the same with all the mistakes that Microsoft did with the launch of Xbox One.
I don't think Nintendo needs a super powerful system, but if it's not x86 the problema with third party support will be the same of The Wii Ü. Launching the NX 3 years into the generation is The main problem anyway.
If you are going to compete with two stablished consoles (and one being a sales juggernaut like is Ps4) You need to have luck, a great product, and market it flawlessly, you won't succeed without this three.
Tim and The Princes...