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Thrust is related to the mass being moved (in our atmosphere it is mostly air) and the speed it is moved. Rockets and jet engines use heat to move thousands of pounds (tons and megagrams) of a heavier gas combination (fuel and oxidizer) at supersonic speed to move their weight into the air. Airplanes just have to move sideways so the speed of the air over the wings will create lift, while a rocket must push directly against gravity.

IF you want to make a flying car, you have to push a lot of air at subsonic speeds, and that causes so much turbulence that it will be noisy. If you push lesser air faster, it will be too noisy (like a fighter jet up close). In a free fall situations, as in an orbit or away form the Earth where its gravity doesn't affect the vehicle, it can use a lesser mass at hypersonic speeds, but the acceleration rate is very slow. The experimental ion engines that are flying in space use a very heavy gas (xenon) at extremely high speeds to move the vehicle.

There are formulas to calculate all of this, and if you use these formulas, you will see why a ion-thrust engine cannot lift a human-sized vehicle on Earth. The devices shown in the video are superlight and the ion thrust can lift them, but only as a proof of concept, not as a real flying car.

Sorry to bust your bubble! Pure magnetic levitation is a much better method for now.
 

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The article mentions that a minimum requirement for potentially generating enough thrust will be extremely high voltages, so there would probably be a fair amount of R&D required to even build a prototype that could hold a person. But it's worth trying, at least to see if the theory can be proven.

Magnetic levitation is a good technology too and it helps reduce the energy required to propel the craft, such as a train. They have this in countries such as China and Japan, and I think we need to build something here in the US using this technology as well.
 
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