Over on the elmoto.net board, there is a guy called BrammoBrian, he designed the Brammo Enertia and the above photo is his own bike.
I think if electrical energy storage becomes more efficient then something like this would really take off. The instant acceleration, lack of maintenance, and the "neat" factor are pluses... I like the style on the Enertia as well, it's sort of a modern bobber standard type look in my opinion.