John Carmack is with Occulus Rift. Don't freaking tell me that you are actually talking about Mark Cerny.
Maybe not from Sony, I own a Wii U. "John Carmack" Gamelab video. Hell, look on youtube.
....are you talking about this video?
Yep, you found it. Fast forward to like 38:00
How does Mark Cerny's (not John Carmack!) talk about why they didn't use 1000GB/s EDRAM for the PS4 say something about the Wii U?
The Wii U doesn't have the fillrate & texel rate to utilize 1000GB/s. Lack of MSAA at 720p in MK8 is rather telling the fillrate & bandwidth of Wii U are no better than last gen consoles.