Do I see this turning up on construction sites in the next few years? No, probably not, for many reasons. Can I see it capturing some of the market of recreational truck buyers? I can, just as the Model S took part of the luxury sports car market by appealing to people who could likely afford more expensive "status" vehicles by being different.
It has status like having the new iPhone on day 1 has status. Different than big money status, but still status.
The type of status that this truck is trying to market to is like the `I paid 1.5 million cash for this crazy pentagon` status.
The only other option I might add is a battery charger for hand tools. I know they can plug into the normal outlet but it seems inefficient to go from 400v --> 110v --> 12v.
You can still haul 4x8' sheets, you just have to be more creative and haul fewer at a time. Otherwise if you need so many you'd reach capacity in an 8' bed, you'd likely have them delivered to the jobsite (yes, even if you own a truck).