Andy Palmer told us they are going to call all Leafs back in for another software update in spring. They are definitely going to flash the CM (Combination Meter), so I asked for the SoC meter to be included. There's no technical reason why they can't do this, but TEG is right, I don't expect them to do it. They probably would also have to issue new owner's manuals again if they did, so that is a big expense and a reason to not do it.
The head unit is a different story, as apparently it requires a special SD card to be ordered by the dealer for it's firmware updates. There's probably no reason you couldn't flash the new code into the old head unit if they end up updating the Gen2 unit with an SD and you can convince the dealer to try it, but I don't expect this to happen.
Even though the Climate control hardware is likely the same, the software is not compatible due to the heat pump, so don't even ask. (The button layout is also different)
-Phil