I can well see this is useful if the commuting trip is unwelcome. But I can't help feeling that if that is so it would be even better to have something going faster still. For instance perhaps the optimum speed for a daily journey of ten miles or so might be between 30 and 40 mph. If properly designed a small ICB moped would easily be capable of this, and could also I suspect be very nearly as "green" as the ebike. Would this be a better option? Is an bike, apart perhaps from pleasant runs on sunny days, a good choice for commuting? I think that in general a car certainly is not.
I would have to answer that question with a resounding yes, the electric bike
for me is the best mode of transport to get into a congested city centre. I have tried a scooter and that can be discounted straight away, fuel, insurance and tax are one thing but what did it for me was the maintenance (tyres, servicing). I can see an electric scooter would have some merit but the disadvantages outweigh the advantages (and as we know we are nowhere near it with battery technology).
The main killer is that it wouldn't save me that much time in rush hour. I think 18-20 mph is the optimum speed to keep up with the traffic and it is the shear weight of traffic that becomes the limiting factor for my journey. I am certainly keeping pace with most two wheelers in town as their bulk slows them down (unless they want to be reckless - overtaking against oncoming traffic is common).
AND I am keeping fit so for me, given the alternatives (buses and tubes), it is the best of the lot. The only thing I wrestle with is the safety and I agonise about this a lot - I don't want to leave the family fatherless.
As for the idea of creating a new class of vehicle I think it would be brilliant but it already mostly exists in electric bikes - those that can go up to 20mph (with pedals) but are and probably always will be illegal.