One of my pet topics ...
IMO the only advantage to the term "e-cigarette" is that it may break the ice with established smokers. Everything other than that is a big negative. The term doesn't actually make
sense - a PV isn't an "electronic cigarette", because a cigarette is literally a small cigar, and a cigar is a roll of tobacco leaves in a paper tube. Even more importantly, in the current social climate, anything described as a cigarette is apt to cause a knee-jerk disgust/fear reaction among the uninformed. The natural assumption is that an "e-cigarette" is just a new/different way of smoking tobacco, which tends to drown out the subtle technicalities (vapor rather than smoke, nicotine/PG/VG rather than tar/arsenic/etc.)
Same applies to referring to "smoking our e-cigarettes". Not only is it literally not true, it's a massive public relations gaffe.
I think it's likely that, once this technology becomes fully established (which might take another generation or so), PVs will simply be referred to as "vapes", in the same way that cigarettes are referred to as "smokes".