The first thing you'd need to do is fix the problem of integrating bicycle traffic with regular traffic, via complete education *and testing* of bike regs and safety for all vehicle operators regardless of what type it is, and for all law enforcement personnel. It'd be best if this education was included early on in regular schooling, too, since apparently no one gets taught anything about using the road or car or bike safety until they are out of high school, or even after that. (I don't even think they teach kids to stop and look both ways before crossing anymore).
Then you'd need to fix the mishmash of local regulations about basic bicycle stuff, which vary quite a lot over just the USA, not even mentioning the rest of the world. Even just where and how riding them is allowed is different within different cities here in the valley of the sun, surrounding Phoenix. I'm not even talking e-bikes, just bikes, period.
Then you need to fix the mishmash of local regs about ebikes. Some treat them like regular bikes, some ban them from bike paths, some ban them from roads, some ban them period or make them useless in some other way.
Along with the above, you'd also have to ENFORCE all the regulations, for cyclists, pedestrians and motor vehicle operators. Right now unless someone is injured or killed in an accident, it's unlikely any tickets will get issued in a bicycle-involved incident, at least not to the vehicle operators. Depends on where you live, but it's common enough to be a real problem.
After all that, you need to fix the traffic infrastructure, to make it consistent how bikes are integrated with traffic on the roads. Just here in the valley there are places where they have 1/4 mile of bike lane which just vanishes into nowhere. Places marked as a shoulder but which have to be used as a bike lane because it is marked as a bike path but there is no room for a bike to ride on the too-narrow road in the very high speed traffic. Fixing how vehicle parking is allowed or not in bike lanes, or how lanes go around parked vehicles, etc. Or just take all the bike lanes out once education and enforcement is fixed, so that traffic operates as one unit.
Then you can start teaching all the people that sell ebikes and bicycles to make sure that they fit the bike to the person who will ride it, and how they will use it, so they don't just toss the thing in the garage after the first five miles because it doesn't even come close to fitting them right, and causes them pain.
After you have done all that, then you can start promoting ebike use and getting more and more people to ride them.
But until it's easy and safe to ride just a regular bike out there, I wouldn't bother with trying to get more people to ride ebikes.
Not quite.. I think when more viable alternatives are available, which hopefully there will be in the coming years. And when gas for that 4x4 with 44" tires is 6 dollars a gallon then you might get through to some. Not that all trucks can go away as Enoobe points out. 
