Source for this? I don't see Qi compatibility mentioned anywhere on Apple's site for the AW3.
I’m assuming as the Apple event showed the watch being charged with a Qi compatiable airpad mat.
Note that the starbucks update is because they weren't actually using the Qi standard but were using PMA instead. Looks like they'll roll out updates to support both.
The AirPower pad seems to be using a capability already extant in the Qi standard, but whether other devices can work with it remains to be seen. More info:
http://appleinsider.com/articles/17...-but-may-not-be-compatible-with-other-devices