Also Tim Sweeney's keynote "The End of the GPU Roadmap" at HPG (which was colocated with Siggraph) can be found here:
http://bit.ly/bniNt
Abstract: "Mainstream GPUs emerged 12 years ago and rapidly evolved from fixed-function graphics accelerators to semi-programmable computing devices. The speaker will argue that the GPU roadmap is now coming to an end, and that future PCs and game consoles will be powered by general computing devices, utilizing multi-core vector-processing units to run all code, graphics and non-graphics, uniformly, at Teraflop performance levels. He'll then give an overview of the design dimensions impacting such an architectures, such as caches, threads, vector sizes, and programming models."
Sweet! Thanks.