I've driven the Nissan Leaf and Tesla S75 and whilst they may deliver unparalleled torque, the weight was always evident.
Where an electric bike would win, hands down, is the charging. I live in a terraced street - I keep my bikes in the house, which means I'd have no problem with plugging a bike in. The cars? If I actually get to park in front of my house, I have to run a cable across the footpath...
I can't see the benefit of actually riding an electric bike. Very limited range, much heavier, long recharge time and, in the event of it refusing to run, where do you start 'fixing' it???