Flying cars are a bad idea, but that hasn't stopped a lot of people wanting them. The vast majority don't give it any thought beyond 'that would be cool', but a

Flying cars are a bad idea, but that hasn't stopped a lot of people wanting them. The vast majority don't give it any thought beyond 'that would be cool', but a few are putting a lot of time and money into trying to make one. It's my opinion that the hardest of all the hard problems is noise, because there aren't many things that can be changed in how lift is generated, and rotors/propellers are intrinsically noise-generating. I think you may be misinterpreting my last sentence. What I mean is that, just because medical science has not delivered immortality, it doesn't mean that there aren't lots of people who would prefer not to die. You could substitute specific causes of death, such as cancer or alzheimer's, into that argument, if you think that most people have come to terms with their mortality.