[Q] What's a good summary of rooting scenarios for Gear S?

[Kanon25]

Can anyone sum up the benefits/cons of rooting scenarios with the Gear S (in terms of functionality gained - or lost) :

1) If I root the Gear S, but not the Samsung phone it is tethered to with the Gear Manager?
2) If I root the phone, but not the Gear S?
3) if I root both devices?