Sounds a bit better than glorified though. With the current 400W inverter, you have to start the truck to provide power, and it will only run idle for 30 minutes before it shuts down. With this new system, the engine will remain running as long as it detects a load. Sounds as if you won't even have to start the truck yourself either. If you plug something in the back, the engine will fire up with enough rpms to meet the load? That part sounds a little concerning, as anyone could just plug in the back and start draining your fuel without having any keyfob access to the truck.
On a similar side note...does this and a new measurement stat to the truck? If a truck is used as a generator on a regular basis, wouldn't that have an significant image on the value of the truck. A 2 year old truck with 20K miles is not the same as 2 year old truck with 20k miles and 2000 hours running idle as a generator.