I expected it to be around 40-45% faster then a 7970 GHz alone considering die-size. If its below 30% like the slide above its Ehh!!! for the price premium of $899 one would expect 50% performance.
Thats a real turn off price. If its 30% faster then 7970 GHz at most $150 higher price tag above that it just become not worth it. 2 7970 GHz are faster at similar or lower price point especially when you consider gaming bundles that you get or sell to recoup money making it a better bang for the buck.
I'm sure someone will buy them no matter what price point.