Of course they are, oil is going nowhere in the long run.
Your right oil will be nothing use for the cars, oil industry will fall. The use of electric cars are ecofriendly they dont emits dirty smokes that makes air polluted, but then the effect of it will really be bad for the oil industries, their profit were gained from cars, so if it happens to be electric cars, it has no use anymore.
Oil won't stay too long if we all use electric cars. How electric cars help to us?. First is it won't release gas that will cause problems in our air or we call it air polution, second, it is ecofriendly so that means less air polution but there is also disadvatage one of it is electricity bill may go up due to use of electricity for electric cars.