"I confess that, in 1901, I said to my brother Orville that men would not fly for 50 years. Two years later, we ourselves were making flights. This demonstration of my inability as a prophet gave me such a shock that I have ever since distrusted myself and have refrained from all prediction."
No one has ever been able to predict where technology is going. This one is for you to tame your forecasting proclivities and for the moron who's downvoting my comments without explaining where my argument is weak. Cheers.
Say that to da Vinci. His flying machines were inspired by birds. He studied Nature and tried to build machines based on the same principles as those that allowed birds to fly. Of course, that led his astray, because it's hard to design machines that fly by flapping their wings. However, the structural part remains. Take a look at how airplanes are designed these days, and you will see that their structure somewhat resembles the bone structure of actual birds.
Last but not least: never say never, and never predict more than 10 years into the future. In 20 years your predictions might be ridiculed.
Perhaps for aesthetics or mechanical and aerodynamic elegance, but never for practicality for human means.