Oh well, the potential to make the 7000 series much faster using improved drivers is not new to us i guess. AMD had kinda crappy drivers and i even think that they can match Nvidia products easely when they finally get the drivers right.
However, after reading some reviews that card seems like a overclocked 7970 without any other advantages. Because the power consume is kinda insane, although a stock clocked 7970 is about same efficiency such as a 680 GTX. The GHZ edition does indeed offer impressive performance and can regulary beat the 680 GTX, however, because its just some high clocked 7970 and not a revolutionary "power save design", i consider it as AMDs rather pointless strike against Nvidia. Although kinda funny how those 2 competitors are able to enrich the GPU market, without them, IT would be not half that entertaining, and much weaker GPUs on the market.
The main improvements however, seems to be done with the newest driver improvements AMD was able to execute. Those improvements does even hit the usual 7970 and the entire 7000 series. Its fun to see that the 7970 got much closer to the 680 GTX, way to close... Nvidia truly have to watch theyr back. Nvidias superiority is currently only focused on the 690 GTX, thats certain, the other cards are at a harsh competition. Why AMD isnt releasing a dual GPU i dont know but i guess AMD is way to busy with different matters and its probably not so easy to cool that card down... because the 7970 seems to run hot and 2 of them is lot of challenge.