The Chevy Volt, which was supposed to have an all-electric drivetrain (with a gas engine that only charged the batteries and didn’t drive the wheels) and was claimed to get 230 MPG, gets gas mileage in the 30’s and has a gas engine that does power the wheels.
The Volt is still an interesting car because it’s a plug hybrid, but it’s a pretty tame next step in the evolution of hybrid cars, not the revolution promised by GM when it was first introduced.