Yes that is the plan with this new DH for the ZigBee Fan/Light Receiver.
@scottalex has it correct but let me clarify; the optional Universal Thermostatic Controller and In-Wall Remote actually come with their own RF only (non ZigBee) receiver. I should have flipped the retail package over and it is still inside the package. Typically people buy those optional remotes for upgrading their fans for RF control only but I bought it to see if the wireless remotes were compatible with the ZigBee receiver AND RF control which my video shows “yes” they are. So think of those as additional wireless remote options to the ZigBee receiver on SmartThings if you so choose to spend the extra money to give you in-wall or Thermostatic control (but it is very basic rudimentary control only BUT with the huge benefit of standalone local control using a remote)
The scenario you are asking above is you don’t need the optional Thermostatic remote because you are asking to do thermostat control via SmartThings devices. It could be done today via CoRE smartapp by @ady624 and I am in the process of re-writing my standalone 3-speed Ceiling Fan Thermostat smartapp to be compatible with this new device handler.
Just note that the device handler is still [Alpha] and is currently under a cool modification by @ranga , @stephack and myself to take advantage of the new parent-child functionality for device handlers. This new capability will hopefully give you exactly what you are asking for in terms of controlling the ZigBee fan/light device using standard smartapps like SmartLighting or Alexa without the hurdle of loading custom smartapp’s