The real innovation that will drive sales will be to make such premium devices as easy to use as a disposable like Blu. One cannot expect most people to mess around with attys, RBAs, carto punches, volts, watts, etc. The real innovation will be a package that:
1. Is simple like a disposable, or something akin to that level of complexity.
2. Is high quality and backed by a good warranty and good customer service - like a Provari.
3. Is more customizable than a disposable only insofar as it affects the user experience - nicotine level, flavors, battery life, etc.
I think we can all agree that devices like the Provari provide a major step up from disposables in terms of quality of vape. The next step is to make the experience simple enough to get into the hands of those who won't spend hours and hours on ECF learning and customizing. Current easy-to-use disposables are not good enough to replace analogs for most people. Deliver a product that is as easy as a Blu, but as powerful as a Provari, and you may just take the industry to the next level in terms of popular acceptance and growth.
I spent years in a previous life as a tech-head and PC guy telling people to "get a Mac" so I wouldn't ever have to be the guy who fixed everyone's computer. Now, nobody calls me for such matters - their Macs generally work, they know how to use them, and they call Apple to fix them when needed. And generally speaking, the consumer doesn't need somebody like me to help set one up when they buy one.
Consider a product like the Vmod by Vapage. It really comes close to a consumer-friendly product, and it is the one I suggest to everyone I know in my crusade to get folks to quit analogs - the few who are left, that is. Offer pre-packaged bottles of juice that screw right in to the device, a step up in quality and reliability a la Provari (I only assume here, my Vmods are working perfectly after a month of heavy use and multiple drops), a good warranty, excellent customer service and widespread retail presence, and a reasonable improvement in vapor production and/or flavor extraction (Vmods are decent, but the Provari with a good atty/tank/RBA is obviously better) - and then you have the type of innovation that leads to whole new levels of revenue, and the makings of solid, effective marketing.
Most devices coming out right now seem to target the same audience of buyers, folks who are on ECF, want many and varied devices, and like to tinker with devices and accessories. Remember, the real battle is against analogs, and no device will ever be as simple or as accessible - buy a pack and some matches, rip 'em open, light one up. The killer device gives most of the satisfaction of that experience with little added complexity or time investment, plus the added bonus of myriad delicious flavors.