What will occur when human can fly in the sky

Hi! I think if humans and all of us people can fly around in the sky, our lives will be much more easier and smootehr. Also, if all of us flies, there will be no more need for cars, buses, trains, ships, boats, yachts, jets, helicopters, and airplaines. We will not need any of those transportation devices since we ourselves can transport ourselves to anywhere in the world. It will also be much cheaper and there will be less need for gas and that other stuff. Which might also help our environment with global warming and stuff. If humans can fly, they would just fly anywhere. Ther wont be traffic on land but traffic in the sky. Maybe also, they will think to build and put up a house in high areas like treetops, mountaintops, or somewhere hihg in the sky and it will be their own private space instead of competing with other people in the land. That swhta I think, what baout you?