No one can say 100% exactly what is going to happen thus far. Let's just say that if the grandfather date (the predicate date) isn't moved up considerably, we won't have much to choose from, because the equipment we're using now is way more advanced than just a few years ago, much less 2007, which is the date mentioned above. Most of the industry will fold due to the exorbitant cost of product applications, which aren't guaranteed to pass. In other words, a company could fill out an application, pay the hundreds of thousands of dollars for just ONE of their products, get refused and lose their application money.
That said, there are multiple lawsuits, inquiries, petitions, Senate bills and proposals, and personal letters in the works. Whether those will make any difference, we can't be sure at this point.
I'm not freaking out, but I'm doing what I can do be prepared for whatever happens. Even if what we have now doesn't disappear, you can bet with the taxes they will levy, things will cost more. Maybe much more.
What you can do:
Get a very reliable mod or two (or five, lol) that has replaceable batteries, not built-in batteries.
Learn to make your own e-liquid. Buy some nic base to store in the freezer.
Get a rebuildable dripping atomizer (RDA) or rebuildable tank atomizer (RTA), and learn to make your own coils. If you are using a tank that requires you buy premade coils, then if that tank somehow just disappears, so will the coils, and you won't be able to buy them any longer. This is the hardest part for me, because I haven't yet found an RTA that fits what I'm looking for, and I don't have a lot of time.
Personally, I have no idea what will happen, but I don't want to take the chance of going back to the paltry cig-a-likes that didn't help me quit smoking.
Boy Scout Motto: Be Prepared.