watchOS makes AppleWatch's NFC chip compatible with Student ID Cards. I really hope that this gets expanded to general RFID tags like condo or office access fobs. I can see the security issue with allowing AppleWatch to copy fobs. So instead, Apple could act as a fob in itself. AppleWatch would only have to make itself available as a unique ID number and access managers in your building would be able to tap your watch on their terminal and then give that number appropriate permissions/access like any other fob. I stopped carrying keys after converting my condo locks to August smart locks but I still have to carry the fob to gain access to the building. This isn't a high level task and can be easily solved.