Is that because the idea of Nintendo having a console more powerful than its competitors three years later is unbelievable? There's nothing mind unusual or mind blowing in the OP. And it's not the first time we've heard any of it.
I do find it kind of unbelievable they will make a relatively big and power hungry box, as it would mark a huge shift in design philosophy.
How much power consumption would it take to be a PS4+ 3 years later? I doubt they can do it under 50 watt which is a lot for a Nintendo console.