It looks like the GTalk transport may end up becoming more than what it currently is in terms of — it might need to be more than just a “copy” of the XMPP transport.
The doc in the link states only changes for the Mobile par (aka Android). Maybe I am thinking too positive here, but it does not state a general “Gtalk moves away from CMMP”.
chuckle Check it out, they updated the change notes. Looks like it is indeed only referring to a conduit between the mobile phone and google talk/whatever, not replacing GTalk.