Let's do some calculation. 120-140WPM = 600-700 characters per minute or about 10-12 characters per second.
Even in ideal situation where consecutive characters fall are alternating between left and right hand, that gives 5-6 characters PER SECOND for a single finger to type.
But it does not look comfortable or effortless at all.
Add to it that you have to look at the keyboard instead of comfortably focus on the screen, you are straining your hands, your eyes and your neck.
So you still loose.
It is a gimmick, there is no way you can work like this hour after hour, day after day, year after year. Most likely this is some kind top speed you can technically reach, but you will not be able to sustain.
Even in ideal situation where consecutive characters fall are alternating between left and right hand, that gives 5-6 characters PER SECOND for a single finger to type.
This guy does it: https://www.youtube.com/watch?v=c9psfOxJysw
But it does not look comfortable or effortless at all.
Add to it that you have to look at the keyboard instead of comfortably focus on the screen, you are straining your hands, your eyes and your neck.
So you still loose.
It is a gimmick, there is no way you can work like this hour after hour, day after day, year after year. Most likely this is some kind top speed you can technically reach, but you will not be able to sustain.