Why would you crossfire a midrange card?
Anyway this seems like a win for NVIDIA for me.
-NVIDIA's big brand name presence means that even if NVIDIA pooped out another 960 they would still sell well. Its hard to overstate how big of an advantage that NVIDIA has in this regard. Many people who are getting into PC gaming will have a much greater chance of ever hearing about a Geforce card than something from AMD.
-There are reports that AIB $250 cards are already available. We are still waiting on AIB 480s that will likely be more than $250 and currently nobody wants to touch the 480's reference design due to bad cooling and bad power delivery.
-Its just... faster. In most games. I think AMD wont see the same "aging well" phenomenon again with DX12 because DX12 makes it really tough to gain performance from better drivers and Asynchronous Compute doesn't make AMD cards a whole lost faster.
-Much more power efficient than 480. You can say you don't care about it until your face goes blue but it does matter to people who buy in this price point.
Basically, if you complained that the 480 wasn't faster than the 390x () then voila.