The 'next gen' AMD GPU is even more of a 'graphics-enabled vector processor' than the Nvidia Fermi in their current GeForce line up attempted to be. Basically, as you see here, we're talking about a mini Cray supercomputer on a chip, with X86-compatible 64-bit addressing and memory management, essentially able to share both virtual and physical memory with the X86 main processors in the system and, if somehow connected via HyperTransport or QuickPath (later doubted though due to the Intel licensing issues) to the CPU, could literally be a very tightly coupled co-processor with its own memory on a side, yet able to address all the main memory at near CPU speed, without PCIe bottlenecks.
If AMD is to use this brand new GPU architecture in the 28 nm Radeon HD7000 series, it will be the most revolutionary GPU change since the advent of programmable shaders in GPUs half a decade ago. We hope it will not affect the core graphics driver performance or stability, of course, but once the initial hurdles are overrun, this will make for a very interesting new system - and application - architecture. Yes, mixing few wide cores and hundreds of narrow cores in one application at one time may sound like a challenge, but the performance gains may more than justify it.
If you liked this article, please give it a quick review on ycombinator or StumbleUpon. Thanks