The Remington Etronix system has been around for a while...
The electric primers need a fairly high voltage or current to fire, hence all the electronics in the buttstock of the rifle. Static electricity isn't enough to fire them off.
Benefits: virtually zero locktime, and a clean trigger pull, adjustable with no stack or creep before electrical contact is made, so it has the potential to be a very accurate system.
Drawbacks: Expensive gun, going for about $1400 in the .22-250 version, and the ammo isn't cheap, either. Remington does sell the electric primers so you can handload your own Etronix rounds. Oh, did I mention the gun has an ignition key in the pistol grip?