Like many others have stated, I don't believe they will ban vaping all together. I think it will come down to nicotine control. Vendors will still be able to sell accessories and still make juice, but they will have to do it with 0 nicotine content. The nicotine e juice will probably be regulated and overly taxed and only legally made by tobacco companies, because government people not in the know think it's somehow tobacco related. And it will probably be disgusting, compared to what is out there currently.
Big or small, there are some sort of changes coming, and it's just a matter of time. I've been working towards being a custom juice vendor, and I'm totally expecting them to not let me use nicotine sooner than later. Hopefully, it will just be regulations on precise nicotine content, and not a complete ban of everything for vendors, but more than likely it will be not allowing unregulated, or possibly even regulated nicotine to be sold by the general public. If it comes to that, then I will just somehow incorporate nicotine inhalers as mouth pieces or drip tips. It would be great if they just left us alone, but that's not going to happen, there's too much money in it now for them to ignore it any longer, or fly under their radar.
And I think we all should stop referring to them as "e-cigarettes", because that immediately has connotations attached to it. We are not holding cigarettes, and we are not smoking. I believe just because there is an "E" in front of the word doesn't mean it's helping the cause. All people that are ignorant to the facts, will only hear "cigarette" and every feeling or opinion they have with cigarettes is automatically applied to PV devices and the people that use them. People fear what they know nothing about, and they love to hate it.