That'd about DOUBLE the size of a wp20 torch head with short back cap i reckon- at least half the stuff i do wouldn't be even be accessible with one of those things
Gimmick with a staged video IMO. Video is almost as comical as the 'accustrike' chin operated welding mask (film sped up to make the accustrike good)
edit: Oh, and unless every single one of your tungstens is an identical length it'll need adjusting each and every time anyway. Don't know about anyone else but all my tungstens are different lengths