Not sure about that one. To me pressure is pressure, does not matter what the medium is.
I worked in aviation where that's all we used. The reasoning was for all the pressure stability reasons, but also for safety reasons that don't really apply to autos. If when landing there is an accident and fire, the tires turn into oxygen bombs if not filled with nitrogen.
Also, to prevent corrosion on the rims. They usually use split rims so any corrosion could potentially lead to catastrophic failure. Bad news...
For cars, I think it's a bit gimmicky. I'd like to see the blow out data over 5-10 years comparing air to nitrogen filled tires.