This is really cool tech, amazing that somebody's managed to get dynamic valve action working reliably. What I'm wondering, though, it what the benefit is of us

This is really cool tech, amazing that somebody's managed to get dynamic valve action working reliably. What I'm wondering, though, it what the benefit is of using it on a hybrid car. It sounds like they did connect the engine mechanically to the drivetrain, with the electric motors mostly assisting. But why not have it just directly drive a generator, with some decent sized batteries? An engine that only runs at full power at a single RPM to charge batteries doesn't benefit much from elaborate valve technology.