so.. is it gonna do 1400 sols/s per card as well?..

I doubt it. The Ethereum hashing increase is from the new memory interface utilizing the HBM2 memory type. This is what will radically speed up the ETH mining. However the core is most likely nearly the same or hopefully close to the nVidia 1080 ti, so if this card got around 700 SOLs that would be quite a bargin as the card is about half the cost of the 1080 TI.
Faster ETH
Same Equihash
A little less power
30-50% less price (depending)
All those stack up for a hell of a deal!