Exactly, right there in the article theres a highlighted quote mentioning this: > Now, the flight duration is too short, and the degree of difficulty too grea

Exactly, right there in the article theres a highlighted quote mentioning this: > Now, the flight duration is too short, and the degree of difficulty too great. But this was also the case for the Wright brothers I think the next step for Jetpacks is to develop automated navigation/stabilization systems. We want a Jetpack for which the normal state is flying at a stable height, then with some kind of 3D joystick we can move steadily up, down, front, back and sideways. I think all of this is currently achievable but too expensive to implement. Also, the amount of energy required to lift a person is just to high, so until better ways to store energy are developed, the "backpack" form factor for storing energy will not cut it for practical flights.