I was actually thinking about the long-distance transmission lines, but that's a good point about potentially needing to upgrade local lines. As a non-EV owner, I can't discuss much but I was under the impression that you could just plug in to a normal wall socket for a slow charge. I suspect that you're referring to the Level 2 quick charging station. If that's the case, that would certainly impact you depending on how old your house is and whether you're running your own solar panels
FYI, if you have a source, I'd be interested in reading about it.