Coal fired power stations are not competitive in many places, they are being replaced by gas and renewables. (Even if this wasn't the case, combustion engines are about 20% efficient, while modern coal-fired power plants are about 33-40% efficiency.)
Electricity consumption is dropping in part because of energy efficiency and people putting solar on the roof. So electric vehicles will be a huge benefit to the companies generating the electricity as well as utility companies. It is the grid that is the main concern.
Utility companies could get into trouble. A 5kW grid tie solar system costs about US$9k (Without subsidies + permits and installation) so if you pay more than 11 cents per kWh, you should investigate if solar on the roof is for you. Time the washing machine etc to start when the sun powers up the panels, feed any excess into your car but depending on your driving, the car will need to get most power at night (when power is cheap) This is what I do, I don't drive much, I work from home, so I usually don't have to charge it at night. Some cars will even allow you to feed the electricity back into your house, quite handy in case of a power outage.
Utility companies used to charge our water heaters when they had surplus electricity, you would hear a loud "bang" as they switched it on. (yes, I am that old) Same can be done for electric cars, the utility companies could even allow consumers to choose the time to charge their car batteries based on cost of electricity and need. This could actually help to stabilize the grid and lower the cost per kWh to the consumer.
A 16kWh off grid system currently costs about US$50k (US$210 a month). In summer you wouldn't know what to do with all the (70kWh daily) power, while in winter you would have just enough to power the house and maybe charge your car batteries a little. If you are closer to the equator you will have more then ample power all year round. I realize that not many people have 50k to spare but prices are expected to drop significantly over the next few years.
Interesting times...
Edit:
"Gas engines ICE are more like 28% and diesels exceed 30% in efficiency." I am sure there are engines that perform better, I used an average. BTW EVs convert about 59%–62% of the electrical energy from the grid to power at the wheels.
At the current price of oil. ICE's need to be far more efficient to compete with the cost of electricity. The only thing holding the electric car back is the cost of batteries, which is falling rapidly. Solid state batteries are being developed by companies like BMW and if they can get them to work economically, we could charge our car in 5 - 10 minutes. (just imagine the size of the cable to hook it up to be charged though and I wonder if it is as safe as a tank of gas in an accident.)
It always makes me laugh when I see people saying this can't be done while industry is already doing it. There are hurdles to overcome as it is scaled up, but come on, imagine that if we didn't have fossil fuels today, we could still have plenty of electricity to run our economies. It is the crazy old farts who are saying it can't be done.