I'm not trying to be a douche, but the eureka moment you had has been discussed here about 100 times.
In the end, we are stuck with it and it is too late to change it.
The whole world knows them as electronic cigarettes, and we don't have any power to change that.
And yes, we have tried, which is why we started trying to call them personal vaporizers.
It didn't even stick here amongst us very well.
Also, it really doesn't matter what we call them, because those that don't want to see "smoke" don't care what they're called.
In fact, many that are opposed to ecigs are now calling them ENDS and they still want them out of sight and out of mind.
ENDS = Electronic Nicotine Delivery System
WHO | Questions and answers on electronic cigarettes or electronic nicotine delivery systems (ENDS)