Sounds like a gimmick. Remember that the spark plugs purpose is an accurate ignition point just before TDC. They've tried everything from multiple spark plugs (good idea) to microwaves. Modern engine computers calculate plug degradation and other engine variables to assure even combustion timing.
Does anybody remember a few years ago when VW came out with their gasoline fed diesel cycle engine? Though it was a true diesel cycle using gasoline instead with something like 14 or 18:1 compression, they added an igniter (like in an oil furnace, not a spark plug) to assure accurate timing burn of the fuel. No throttle butterfly and timing via direct injection. The prototype engine was said to produce around a hundred horsepower and get over 80 MPG in a field tested Golf. Lots of hype in magazines, then nothing. It apparently worked but who knows it could have been a not passing emissions sort of deal.
