This was the Wii Remote Plus that I got with Wii Party U this morning:
You can see that the SYNC button is no longer hidden in the battery compartment. The battery compartment and the plastic protector have been modified to give access to this button without having to remote everything.
No telling yet if this is still "TR", or if this is something completely new that won't work with HBC Apps. (I don't plan on pairing this to my Wii to find out, either).