Electric scoring has been the standard if sport fencing for years. It has its advantages; you hit, you score without having to worry about whether or not the judge saw it. It also has its disadvantages; the amount of pressure needed for a score is hardly what you would need to apply in the use of an actual sword, you're teathered, because the action is too fast for wireless (believe it or not), and you have the added headaches of equipment failure due to electronics.It will be interesting to see how they apply the use of the electronic system. If it will register punches better, perhaps that will cause a shift to a more dynamic and traditional style.
Also if the electronic systems are affordable enough, it could change the stop and call for points competitions. It would speed them up and make to where you have to be ready to defend as well as strike. I think it might also encourage more combinations instead of throwing one thing and then waiting to see if it scored.
I do think that it could work fairly well for taekwondo, but I have no first or even second hand knowledge of how well it actually works.
Daniel