I agree in the sense that Nintendo feels this level of visual fidelity will be adequate for their needs for a long time.
Just like the GameCube generation was effectively like 11 years ... because they recycled the chip/tech for the Wii.
So if they are planning a hybrid platform, yes, I could see it being slightly better than the Wii U/similar to the GameCube-Wii situation, they probably won't directly re-use the chip but select a new mobile (ARM/mobile GPU) chip that approximates Wii U performance and has dev libraries that allow for more streamlined porting of Wii U engines/games if need be.
But if you're saying one continuos generation of just the Wii U ... no way. They will be largely done with the Wii U as it exists now after 2016.
I wouldn't be that surprised if the next Nintendo platform is a hybrid machine that can run the same level Wii U graphics at 1080p instead of 720p and has a much faster OS/loading times (due to better RAM). That I can see happening.
