I heard about Formula E for the first time today. Really like the idea, was thinking about hybrid feasibility for F1 while cycling only last Wednesday, and this fully electric setup could well replace my (long fading) interest in F1. And it could give a nice boost for new city based tracks to drive virtual laps on too.
I think the main issue with the Formula E format is the fact the drivers have to change cars once during the race as a "refuel". I hope that they change this in the future to have replacable battery packs or even induction charging areas on the track (so they get a charge boost at points around the lap).