With some severe head and neck injuries, this would be fantastic. It's almost impossible to get current helmet designs off the head without risking further very serious problems. A simple solution to a well known and serious problem.
Wouldn't it be better to create cervical collars that would fit a neck with a helmet on, than a helmet that has a seam in it? I'd rather just immobilize the neck till the person can be gotten to the hospital than have a helmet that risks splitting open.
Another design included an air bladder inside the helmet. The idea was that an EMT could inflate the bladder and gently remove the helmet using air pressure instead of pulling on the injured rider's neck and head.
That idea got slowed by fear of personal injury lawyers. Mr. Robusti will face the same problem, at least in the USA.
If either of these ideas look promising enough, racers will eventually try them. After the idea has been tested and proven in a racing environment, I would guess that the legal system would be less of a problem.
We are not the only ones who would benefit from a helmet removal technology. Anyone who wears a crash helmet and risks crashes will benefit. If it really works, maybe it could be applied to football helmets and other sports helmets.
This specific idea may or may not be a good one, but it addresses a problem that needs a lot of attention.