Well, the Galaxy S7 Active has Always On Display by default - it was the first Galaxy device to have that actually, the Note 7 came out after the GS7A did and has it but the Active had it first.
And yes, what Samsung is attempting to do is backport some of the features of the Active and the Note 7 like Always On Display to the S7 and S7 Edge so people with the Note 7 that are still holding on to them and not returning them as they should do now have at least a little more incentive to do so and get some of that Note 7 functionality as part of the return/exchange process if they do decide to get another device in exchange and not just a full refund.
It's a good thing, Samsung at least is trying to give people options but many people simply refuse to return their Note 7 devices, sadly.