Unfortunately, the documentary I was watching didn't get into details like toxicity - I suppose the technology is still under development, thus the "nitty gritty" details are probably quite a ways away.
But it is a safe bet that new technologies like this will be, at very least, very heavily regulated - either by the manufacturer, the government, or both.
I suppose it will depend on how much the manufacturer wants to make on the application process, and what kind of hazardous materials go into the stuff.
One thing is for sure: with the changes going on in coatings manufacturing, only time will tell.