Sure, that scorpion chair is utterly ridiculous, but man does it look cool. And a chair that switches between upright and reclining position, while adjusting the position of your screen to match; I can certainly see the attraction in that.
When I looked at that chair my reaction was...
Hey, I saw this on HN some days ago!
Yep, another guy made a "lay down desk", and explained his reasons that the only way to make it work right was with a scorpion-like design.
The scorpion-chair looks like a industrialized version of the "lay down desk" wooden "prototype".
Also it's probably not built to last - otherwise it would cost a fortune(not that the $3k+ isn't already a lot, but the closest thing to this that I can think of - a dental chair - usually starts at twice the price).
I mean, it takes a very determined mind to come up with a sales pitch for that ridiculous scorpion chair outside of a sci-fi set, it doesn't look like something you easily get out of to got to the toilet.