Saying that it is unproven NOW is no reason to suggest that it will never be proven. We put our lives in the hands of computers whenever we get on a plane nowdays, and I'm sure there were plenty of old pilots in previous decades who said they'd NEVER get in the cockpit of a newfangled computer plane. Having said this I fully concede that the invention of the 747 provided no good reason to ban cessnas and biplanes.
I know that when I call the cops nowdays, I have to accept that their current firearms may not work "100%" of the time because there is a chance of failure with mechanical firearms. I'm sure these reliability statistics come into play when police forces choose which mechanical weapons manufacturer to go with.
Last of all, us Aussies might just go and invent a better reason to "go electronic".
http://www.metalstorm.com/