If the trip is much shorter in the air, it may bring the energy consumption closer to ground travel, but even then if we're talking electric energy, renewables are set to make that so cheap it doesn't matter compared to other factors like convenience (it's already that cheap, and dropping every year.)
Commercial air travel is far safer than most forms of ground transport , so it's at least possible that personal air transport could one day be safer than driving.
The big thing really is the advancements in materials science and energy storage density. I don't think we're there yet. But in the next 50 years, very likely in my opinion.
The one thing that may not be fixable is the noise. But this is primarily important for rural living. Air taxis could pick you up and drop you at the subway station outside the city, where the nose won't be that big of a concern.
renewable energy sources combined with electrically driven transportation never meant we would do less travel or use less energy over all. it means what all break through events in power generation and efficiency meant, more of it for more uses and more people.
clean easily obtainable energy is going to lead to an explosion travel and who knows what forms it will take
Jet travel is sort of energy efficient because it's a flying bus with 100+ passengers. VTOL flying cars are not.
""" Doing the math
In other words, take these comparisons with a grain of salt: In 2013, traffic accidents killed 32,719 people, according to the National Highway Traffic Safety Administration (NHTSA). The fatality rate was 1.1 deaths per 100 million vehicle-miles traveled. Assuming an average vehicle speed of 50 miles per hour (a big assumption), the fatality rate for automobiles translates to 1.1 per every 2 million hours.
Taking the preliminary 2013 fatality rate in general aviation of 1.05 fatalities for every 100,000 hours of flight time and scaling it up to 2 million hours gives a comparison rate of 21 general aviation fatalities per every 2 million hours. This suggests that stepping on a private plane is about 19 times more dangerous than getting into the family sedan. """
from: https://www.livescience.com/49701-private-planes-safety.html