Missing from this Excitement - though it's rather obvious, I thought:
1) What's the INPUT RF power ??
(and.. it's never 100% efficient to convert DC power to RF output levels - nor can the ionization process suggested.. achieve 100% efficiency)
-VS-
2) The OUTPUT gases' recombination [H + O reaction] power output ??
(Power = Energy/Time, so one can just compare KW-hours - no need for actual real-time Power measurement.)
TANSTAAFL
Maybe next we can do electric cars as panacea, too - but with the Numbers / skip the dream fluff.
Teacher to naval pupil:
"A ship is bearing down on you, your ammunition is low - what do you do?"
Seaman:
"Sir! sink it with a sub, Sir!"
Teach:
"Where did you get the sub?"
Seaman:
"Sir! same place you got the ship, Sir!!"