I don't think the HD 7970 owns the GTX 680 and the GTX 680 offered a cheaper MSRP than the original HD 7970 MSRP of 549! Even the HD 7970GE doesn't own the GTX 680 and actually surprising the efficiency of the GK-104 over time against strong competition from the talents of AMD.
I hope you objected strongly with AMD's launch, where they raised their MSRP's by 50 percent.
I know I was personally attacked for offering this below and simply had enough and offered, " Go Premiums!"
Even though 28nm and the arches are substantial and significant, the price/performance was more-so evolutionary and incremental -- consistently offered for both parties.
Ultimately, the market decides, vote with one's wallet, offer a vocal view and share, have no problem with this as long as things don't get personal.
Yes i waited over a year to buy my 7970 because i wouldnt pay AMD's inflated prices. Neither would i pay Nvidia £400 for 2GB of Vram. Then i wouldnt pay £850 for the 690 GTX...
Just like i wont pay £850 for a 7990 when i can buy 2x 7970 for £520.
I dont think any of Nvidias products are worth the money and the 7990 isnt either.