Comment Even more to it than *that*... (Score 2) 59
According to the Reg (page 2) Power8 is going to have some sort of memory coherence function for accelerators. Allowing the GPU to be just another first-class processor with regards to memory could be a big win, performance-wise, not to mention making it easier to program.
The latest version of CUDA (version 6) has also just added features in the same area (unified memory mgmt). Anandtech has some more info about that.
This thing will be beast!