AC Propulsion -- Plug-In HEV with Vehicle to Grid Power Flow

AC Propulsion converted a Jetta to a serial hybrid, with plug-in and vehicle-to-grid power flow capabilities. Interesting stuff: Business Information: AC Propulsion -- Plug-In HEV with Vehicle to Grid Power Flow

They also have a 3.6 sec 0-60 all-electric sports car with a 300 mile range. Why do we need hydrogen-based fuel cell vehicles?