Interesting to think that people who can no longer climb due to a limitation will be the people to benefit the most. If they have a limitation riding up to the trail, will they not have a limitation riding down on a heavier bike? If these bikes allow less skilled people to access more trails, then we'll see more people wanting these trails dumbed down so they can ride them. What will happen if these bikes allow more people to access difficult trail that they can't ride down. The trails will get more eroded and they will more likely get hurt.
Is it elitist to want to preserve the trail experience? I think e-bikes will be great for commuting, but keep them off the trails. Its elitist of beginner and less experienced riders to want trails to cater only to them.