The Wii U came out 6 years later and had:
- a slower cpu
- slower ram
- only a 50% more powerful GPU
NX will come out 3-4 years later and barring a complete shift in the way Nintendo operates not be that much different.
You forget that Wii U also had 4x more RAM.
At end Wii U has much better stronger GPU with twice amount of RAM than PS3/Xbox 360 but somehow slower CPU and RAM, so Wii U have similar power like PS3/Xbox 360 and even slightly above.
You have to factor in with the wii u that it has more memory but its lower memory bandwidth so to fill that 2GB of memory takes much, much longer than 512MB on 360 or the two 256MB banks on ps3 are quicker again. However both 360 and wii u have additional very fast memory, 10MB on 360 and 32MB on wii u. No hard drive as standard on wii u either and if you connect one externally its bottlenecked by a slow usb2.0 interface.
Also its pretty much confirmed that the wii u main gpu is 176gflops not 352gflops plus it has the additional wii gpu which may operate in a turbo mode as the gamepad's graphic engine. Still admittedly the wii u's gpu is still more powerful than 360 and ps3 due to its later architecture. It just does many things much more efficiently and relies less on other resources like the cpu's.
The wii u is a seriously weak console which doesn't quite manage to match 360 and ps3 for most games.
However I'm really hopeful Nintendo will make the NX far more competitive. I think they realise now the game is up, shit hardware at inflated prices just won't cut it and I think they'll bring something to market with very decent cpu performance for a console and competitive gpu performance plus perhaps a few new innovations.
I'm not expecting great third party support I'm just hopeing for amazing Nintendo first party games using this much more capable hardware.
I really hope they get it right this time as anything less may mean an exit from home console hardware. Luckily AMD are doing some amazing gpu and cpu tech at the moment and the 16nm fabrication process is a possibility so a cheap powerful console with low power requirements is definitely possible. Both ps4 and xbone are very weak with regards cpu performance and