No more jumping into a car over and over because you were trying to refuel it. No more trying to find that sweet spot to get the gas in the trunk. Now, just hold down the Enter/Exit button and your character will fuel it up. Easy peasy.
QOL improvement that can make the difference between life and death. Whether that's a survivor on the field trying to escape a freak, a survivor at home waiting for a cure, or a controller about to be thrown through a wall. It will get one of the simpler but more consistent frustrations with the game.