Keep in mind the 3870 and 4870 were priced in the sub $300 markets. The 5870 was the one outside the norm.

Now that ATI might have a design for the top single GPU, something it was reluctant to do before, it might very well push the x8xx's back down the < $300 range, and re-introduce big powerful single GPU's with the x9xx's. When considered in that light... Cayman should be a beast!