Not following at all. Apples to Oranges, this is just another batty backup system like any other. It shares nothing with the LEAF in any way, in fact it is an example of all the opposites. I think you lost me on the point of posting this, SAFT and others have been doing these things for years, this is just a more insulated version for colder temps. It's just another press release of nothing new. I suppose if you insulate the LEAF pack, put in a grid-tied inverter, and full thermal cooling then you will have similarities. You said:
"Interesting that the Leaf battery BMS/Heater system accomplished a similar goal with similar technology years ago - likely for 1/10 the cost!"
Please explain how you came to this conclusion, they are not the same and the LEAF has NO cooling and only a primitive and inefficient heating system that would not work in this situation. You can't compare the cost. The LEAF system would not even function here. The only thing these two have in common is a battery.