Realistically, pizzas are a pretty poorly shaped thing for a drone to carry since it would block all of the propellers and it would definitely be way more effort to keep warm. Self driving cars are probably perfect for this, though. In California, self driving cars are classified as neighborhood vehicles which can't go over 25 which is probably fine for restaurant delivery.

Land vehicles do have a size advantage that can be used for en route baking: https://www.bloomberg.com/news/articles/2016-06-24/inside-si...

I would really like to see the air delivery though. Maybe a calzone or stromboli would be more viable.

I believe the concept has been tested with burritos: http://www.darwinaerospace.com/burritobomber

What a wonderful future we live in!

"Cooler" scale ground drones seem like the thing being done for pizza now. See starship.xyz and Domino's DRU for examples that are already entering service. Potentially very effective stuff that can beat the flying and car-sized stuff just by being simpler to engineer and faster to market, with minimal regulatory issue.