The 1070 has a long way to go before it's worth a look. The entry cost of $400/card is just too steep to overcome without some serious hash.
Edit: AMD guys are quibbling over 0.5% using ssl and 2%-4% in pool variance.
Nvidia guys are paying a 20% premium just to play the game and screaming victory. It would be funny if it wasn't so pathetic.
It's nice for those of us that already HAVE the 1070s, but I certainly wouldn't consider buying one over 1.8-2x RX 470s just to mine with.
On the other hand, some folks are ALL ABOUT "I've got the fastest, nah nah nah!"...
...in which case the Titan X Pascal has been reported at well over 500 sol/s on eqm 1.0.4a
I won't get into the $1200 - it's NOT WORTH IT unless you already have the card!