Yes, the built-in 110v/220v power outlets and air compressor would go a long way when your on a remote build site. I can imagine it being very popular with "handyman" contractors you hire to fix your fence or repair a porch railing.

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.