No doubt. Not sure anyone uses them in laptops any more, but power tools make up a pretty large segment of the market. That's why I said this part:
"they wouldn't necessarily change the form factor on everything, making all the battery pack using industries redesign."
After all, 18650 just refers to the shape/size. So it seems a new tech would just mean that you might get double, triple, whatever mAh from a battery the same size. And battery makers would just continue making 18650's with much more power, since all the battery packs already accept those. What I was getting at is that I
assume that the amount of power available wouldn't affect a mod's ability to use it, but was kind of hoping someone that knows this kind of thing might chime in to reassure us.