As a basic transportation vehicle with electric motor expect 2 wheeled conveyances to evolve differently than bicycles ridden for simple exercise and as a sport with product designed for ride quality and superior handling characteristics.

Mopeds, scooters, ebikes will take off next time the price of oil goes way up.
If it has any motor, I suggest it be called 'moped', not e-bike.
E-bike terminology will ultimately be detrimental to non-motorized cyclists.

Please stop confusing motorized and non-motorized transportation and sport, let's keep them separate as well in the minds of the larger population. Especially with people who regulate us.