The built-in generator options don't output any more power than a generator that you can buy at any home improvement store for several hundred dollars. Sure, having it integrated into the vehicle might be a nice feature, but I don't see anything special about the power output.

This just replaces a free-standing generator strapped down in the back of the truck. Those tend to be noisy but they're relatively cheap. I doubt most jobsites care that much about the noise, but I suppose tailgaters might like it. On the other hand, tailgaters tend to prefer inverter generators which are very quiet and use very little gas.

In fact, thinking more about it, I wouldn't want to be at a tailgate with an F150 running all day spewing exhaust all over. A small portable generator and an extension cord can be located relatively far away from the gathering - that's a lot harder to do with the truck itself.