Keep in mind AMD went and changed their numbering. I wouldn't be surprised if the release a 6990.
Regardless, not dissapointed in the least. The top cards are always way overpriced, further skewing their price/performance. 6870, 6950, 470, 570 are about all the power you really need.
Anyway, I won't be in the hunt for a new GPU for a few years so I'm just looking forward to see what die-shrinks will bring.