I heard my first drone the other day that I was not expecting. Just a loudish buzzing sound in the sky while walking in a park. Looked up and it was pretty high

I heard my first drone the other day that I was not expecting. Just a loudish buzzing sound in the sky while walking in a park. Looked up and it was pretty high and not very large. I was hoping flying personal transport could solve some serious problems like traffic jams, but now I'm fearful. Like Elon mentioned, noise will be a problem (barring some new levitation system).