The more I read on this, the more I think AMD/ATI are going the wrong way. Intel just owned the market with what? Low-heat, low-power consuming, uber-effectient, uber-fast processors. It might still be a ways off, but nvidia is way more cutting edge and innovative that ATI is. I wouldn't be surprised if right when ATI seems to be getting the lead, nvidia comes out with some low-heat multi-core GPU and completely rock the world again. Nvidia was first to multi-GPU (well, after they bought 3dfx), have led in raw speed ever since the 6-series, first to HDR, first to DX10, and I predict by the time the R600 gets to the shelves, nvidia will pretty much have it beaten already with an 8800gx2 or 8900gtx or something like that.
Nice try ATI, but too little (or in computer talk too much) too late. Get it to the shelves as quick as you can, and start working on the next thing.