Pizza-Fax use cases are the perfect smoke-and-mirrors demos that point toward where a new disruptive system could go.
In 1994, Pizza Hut's PizzaNet let you order pizza online in Santa Cruz—but all it did was route your order to Wichita and back, then have someone call you to verify.
By 1995, World Wide Waiter in Silicon Valley had an even better trick: their web form just faxed your order to the restaurant.
Pure theater!
A CGI script sending a fax to a confused pizzeria.
But that theater was the scaffolding for the future.
The users didn't need to know it was held together with duct tape and fax machines.
They just needed to see that ordering food online was possible.
This is the beauty of early-stage demos: they don't have to be real, they just have to be believable enough to bootstrap belief in the future.
The shared belief encourages people to invest in the future, and make it real.