Kind of neat in a gimmicky way. Just uses a brushless electric motor to pull off it's magic.
AND it is not practical for anything other than channeling an air stream and when used to kool you well then you would have to stick your head in it as he suggests at one point in the first video.
That's not what he said in the video. He said you could stick your hand or even your head into it as he was demonstrating how safe it was due to not having exposed rotating parts.As for usefulness, well it's a fan. The video was neat in that it showed several well placed fans set up to direct a balloon from one to the other. In reality it's just a fan and would still blow air like any other fan that cools you off.
The basic concept of his using a small amount of air to draw in large amounts of air is not new. Rapid inflation systems like airplane emergency exit slide ramps inflate the same way. They use a small chemical charge that burns inside a funnel-like nozzle that greatly increases the airflow into the slide.
I know what he meant but you failed to read my sarcasm, point being it's very directional and channels it's flow in a tight pattern which is not practical unless it's on a rotating base as pictured in his demonstration for cooling scenarios whereas a rotating blade fan directs air willy nilly in a not so compressed pattern.
I've dealt with directional air flow in animal housing cooling for a living so this is not my first rodeo.
I always did and still do enjoy the soothing sound of the fan running.