We talked to the esteemed futurist, theoretical physicist, and best-selling author in order to find out just what the holdup is with flying automobiles.

After some 80 years of empty promises, faulty predictions, countless science fiction films and comic books, and a rather famous animated TV series from the 1960s, Terrafugia may be the first company to develop and produce an actual flying car. Never mind that it costs $279,000 for now—the point is that it exists, and that so far, it seems to .

That alone is cause for celebration. Plus, the design isn't even all that radical: The Terrafugia Transition is a simple two-seater with folding wings. It runs on regular unleaded, and can fly in the air or drive on a highway. Terrafugia says the first production models will be ready for customer delivery in about a year. But would a flying car ever really be practical? More importantly, when can we all buy one?

To get some expert opinion and much-needed perspective here at PCMag, we asked Dr. Michio Kaku, esteemed theoretical physicist and best-selling author of Physics of the Future: How Science Will Shape Human Destiny and Our Daily Lives by the Year 2100, for his take on Terrafugia and flying cars in general. Here's what he had to say.

PCMag: For those who haven't yet read your book, why aren't there flying cars on a mass scale yet?

Kaku: I often get asked, "Where's my flying car? You guys promised me a flying car years ago." Actually, it was cartoonists who promised you the flying car, not scientists. Scientists have known for decades that a flying car would be extremely expensive. It would consume vast amounts of fuel, just to stay in one spot, and would be beyond the means of any middle class family. The fundamental problem is cost, and has been for decades.

Could the Terrafugia Transition change that? Obviously not at $279,000, but just considering the design.

The Terrafugia Transition is a step in the right direction, but there is a long ways to go. For my Discovery Channel series 2057 that I hosted, we actually filmed a flying car. It looked quite futuristic and seemed to come from a science fiction movie. But again, it was mainly an expensive toy for millionaires. Although this new car has many nice features, it is a massive gas guzzler.

Could our society ever support flying cars if the cost came down?

My personal favorite for the flying car is to use superconducting supermagnets. One day, if we have room temperature superconductors, then our cars would float on a cushion of magnetism. Our roads would be made of this superconductor; to get our cars going, all we have to do is blow on them, and they start to move. It would solve the energy crisis, since much of our oil goes into overcoming the friction of the road. Without friction, our gas consumption would drop drastically, almost to zero. Hence, it would solve the energy crisis and the global warming problem at the same time.

We already have magnetic trains, but the costs, once again, are enormous. But once room temperature superconductors are created, it would cost nothing to create supermagnets. It means that the might also become a reality as well.

For more, see the 12 Flying Cars That Paved the Way for the Terrafugia Transition slideshow below, as well as and .

For more from Jamie, follow him on Twitter: @jlendino.