This is a supply and demand problem. I think USB-PD laptops will pull a demand which a pocketable portable charger cannot safely meet.
Then there is the obvious gap in products which limit demand, like the Powerhouse is so physically heavy it calls for car-camping and it was not designed to be recharged by a car, then its for long off-grid near-car situations and it would be better with a solar charger option (I think unregulated to lower cost) so if they put that lot together it would pull a lot more demand and cause innovation.
Powerhouse, and the Nebular Mars also have a future together, one lets you have lots of power off-grid camping and the other gives you something to use all of that power. Currently they are significantly incompatible apart from the AC, but I'm sure a future USB-PD input Nebula can benefit from a future USB-PD output Powercore.