[Kevmo]

And it has to show some advantage over other heating methods,
***so, let’s say you’re NATO and you need some heat in Antarctica. One of these burns up some Hydrogen and a few pounds of Nickel, rather than several thousand gallons of heating fuel. Those are distinct advantages.

[count-your-change]

Let's use your scenario.
Someone is going to haul a shipping container sized heat generator to the Antarctic, a device of unproven reliability and unknown technology along with an electrical generator to power it up. If it fails no one can fix it because no one knows how it works and it has a self destruct mechanism.

Heating oil or diesel is already on hand for tractors and generators for electricity so who needs another piece of equipment that will require both anyway?

Say ten years down the road the thing is refined a bit and actually works, in a polar climate diesel and electrical generators will still have to be used and available if only to start the purported fusion heater up.