Dude, Thanks for clarification, but the only plasma that I know is an ionized gas in the low pressure, and mostly(not always) formed by high electric voltage, and current
In fabrication of electronic devices, some of techniques, including for etching, and also deposition use plasma.
I did not understand what other plasma you thought that I may think about it.
Anyway, it seems to be an interesting technique, although we need to wait for some technical details to be published later, and understand how they are going to ionize the air and how to control it. I don't know how much plasma, the steering requires, but, if it is not much amount of plasma, I was thinking that they may have an air valve to some cylinder inside the fighter, then expand the cylinder, and then apply a pulse of high voltage, create the plasma, and then inject it close to wings or wherever else which is necessary. But, I think the most probable usage of plasma in this case is what Skulls and Bones has explained here: