Old technology influence today

The generic wheel is an old technology from the past that will have a major impact in the future. Today we see companies like Tesla and Toyota building electric cars but in the future we may see some type of new car technology such as the flying car, something similar to the Delorean from Back To The Future 2 is what I imagine a flying car would be like. I think this technology is not far away from being put into production and will be in the near future and there will be a point when a company finally makes it happen, especially like company giants such as Tesla headed by Elon Musk who is arguably one of the smartest people alive today.