Very cool idea, and if it was real we’re pretty sure a humongous market for third party cartridges would instantly emerge. “My pie is better than yours!”
Electrolux Design Lab is an annual competition where some truly amazing designs emerge. This year a 3D printer showed up among the various science fiction appliances. The idea is to pop open the top and insert a cartridge containing the print material, erm, the “food”. At the lower end a print head moves about the chamber and assembles the food molecules into the appropriate arrangement.