Actually just clicked the link just out of curiosity....
'Electrical energy from the engine’s power coil is stored in the built-in capacitor.'
Think they're overlooking that the coil is basically just a capacitor, or power amplifier depending what you want to call it. From what they've written the only way they're any different from any other plug is the built in capacitor, something essentially the car already has before the plug. Making it completly pointless.
I'm also thinking.... The standard coil has a permanent power supply making the storage and release of amplified power possible, these plugs will be receiving intermitant power making it impossible to amplify the power any more than the coil already supplies. If anything they would create a weaker spark due to the extra resistance of the capacitor built into them...