Electric cars can run on power from hydroelectric, wind, geothermal, tidal, solar, and nuclear sources, which is enough benefit by itself to switch from ICEs. But even if every power plant burned the same gas we put in our cars, switching would still lower emissions because power plants are more efficient than car engines and transporting electricity is more efficient than transporting gas.

Hydrogen is a dead end IMHO. Fuel cells are expensive and have many limitations, plus containment and transfer are still unsolved problems. Batteries are improving fast enough now (notwithstanding popular sentiment from people wanting Moore's Law speeds) that hydrogen will never catch up.