I've been driving electric cars for years and love them - they are the future. I'd never go back to a fossil car.
Yes, electric cars is a big threat to oil industry. There are already successful electric cars design many years past but still hidden to the public for mass production, oil industry prevent them to show up because its a big negative effect for oil business of the whole world.
Electric cars are the proof that we are in the stage of evolution and a lot of people are now getting into the industry of electric cars because it is eco friendly and it is suited for this era that we are in, the technology era so the oil industry will be going to get bankrupt soon since one of its big market is the cars that need gas.