The s-7 is far far away. Which is why the s-5+ is being offered.
This S5+ isn't even CLOSE to the S5 or S7, completely different marketing target.
If it was a SINGLE unit, then it might actually be a viable stopgap - but as is, ASSUMING IT IS REAL, it's more of a S4+/S6 stopgap and not even close to being a S7 placeholder.
Also, the S7 is NOT "far far away" - it is almost 100% certainty IN PRODUCTION, just not being sold 'till Bitmain sells off the S5s in their farm/Hashnest.
Bitmain did officially confirm this S5+ as a real product in one of the speculation threads, currently only offered on their chinese website (and was apparently meant origanally as a china-only product) but they also said it would be available on their main site Friday.