We may someday see hybrid cars with turbine-electric engines including steam turbine-electric if the price is low enough. Steam turbine-electric engines for ships were superseded in the 1930s as the designers needed to reduce the rotations from a 3,000 rpm turbine to a 300 rpm propeller. Such mechanics added size, weight, and complexity compared to a diesel engine. With electric cars or electric propulsion ships such as the COmbined Gas-Electric-Steam (COGES) in cruise ships, the technology may be feasible in the future.
The turbine needed to power a generator for a hybrid car could very small and light weight compared to a diesel-electric or gas-electric.