Well, I'm old, and my dog thinks I'm salty. But I'm also a past University Fire Marshal and a manufacturer's association certified fire extinguisher technician.
This little bomb disperses dry agent from a single
location. That works in a box with fire around the inside, as in the video, but misses a lot when it goes off in a space such as an engine room. A hand held ABC exinguisher lets you move about aiming it into the spaces you missed on the first shot. It also allows you to renew the coverage if it re-ignites.
The usual solution to the problem with an automatic extinguisher is to use several origins and keep going for awhile (e.g. sprinklers), or use a gas the displaces air in all the small spaces (Halon, CO2).
In other words, it has the advantage of being automatic, but as an automatic it may not be the best choice. Even a ABC with a fusible link mounted above your engine will keep making an unholy mess for a longer period.
There are other details, such as depth
of coverage of spilled fuel
, but I doubt that this extinguisher will revolutionize fire fighting. It also will not satisfy the US Coast Guard.