well, indeed 563.2GB/s of 32MB still looks a lot away from 8GB of 176GB/s, but we also have to consider that the guy is only taking into account the old 1024bits per macro of the 360 for the wiiu, so after 7 years maybe they can produce something like 2048bits per macro which would give something reallly near the terabyte, this also explains how sony was aiming for more than a terabyte of edram bandwidth for the ps4 with edram
another adventage of then dram besides the bandwidth is speed and super low latency i the order of some nanoseconds while the gdr5 and ddr3 are miliseconds
hope someone will contact this bob paterson soon
http://siliconvalleywriting.com/Bob%20Peterson%20sample_Embedded%20DRAM%20for%20Xbox%20360.pdf
even if wii u has a bandwidth with edram between 500gb/s and 1terabyte that wont make it stronger than ps4 or 360, jbut can give the enough boost to use the tesselation+dsplacements efficiently so that the graphics can still look close to what ps4 or xbox one can, still a step behind but close
