Great timeline, as well as the replies.
Regarding food 3D printing, the first point is that its widespread adoption would render supermarkets (if not restaurants) obsolete, not just give them a new source of food products.
Also, food would not be printed out of thin air, we would need alternative protein sources to stop relying on slaughtering animals (Beyond Meat approach). Or, edible flesh could be produced via cell culture/3D printing (Modern Meadow's approach).
Thanks for enticing the discussion.

I follow food 3D printing at @foodfabbing