Just chucking this in the ring again, I’m still definitely interested in Samsung Pay support.
Recently I’ve seen a surge in the number of Gear S3s around so there is definitely a growing user base for this.
Advantages over Google Pay? Very little, Samsung Pay has a couple niceties like adding a card via NFC, paying with Tizen watches, and ties into Samsung phones cleaner.
I’m aware this is probably still an unlikely thing to happen but it would be a nice thing to have.