Just to be sure and have clarification of that at first, is the NFC of the Smartwatch 3 just an embedded tag or is it a theoretically fully functioning NFC-chip?
The smartwatch supports NFC, based on the specs here http://www.smartwatchspecifications.com/Device/smartwatch-3-swr50/, yet there is no NFC API available as of now, hopefully there will be one, I'm also looking for this functionality, planning to develop apps with this feature