In addition to instant torque (electric motors provide full torque across the entire RPM range) electric motors allow you to independently, and very quickly, control the speed of individual wheels. I've been waiting for the day where cars will have individual motors driving each wheel. In that way, steering almost becomes obsolete in that to change direction you can significantly speed up the outer wheels while simultaneously slowing down (or even reversing) the inner wheels. Think about how a tank turns. In that way, you can almost negate the grip limitation of tires (almost, you still have momentum and other forces to deal with), but there will be a day where the limitation would be the human limitations (or comfort) rather than the actual physical limits of the car's capabilities. This appears to be the next progressive step towards that future technology.