The main problem with that is the cheese doesn't cut off flow as soon as you stop pressing. Find a way to cut the flow cleanly and there could be an artistic use similar to stippling. Layering the effect could create 3d shapes, block or balloon lettering for a Cheese & Crackers experience of a lifetime.
Great idea, needs mechanical refinement. Perhaps if the Cheese Wiz can is loaded into a delivery module that is pressurized and has computer controlled variable nozzles. Perhaps printing onto an edible media like prosciutto or pepperoni sheets?
Perhaps a swing-away blade so that when the mechanical arms moves back to stop the flow of cheese the blade would then swing to cleanly stop the flow. For simplicity purposes ideally it'd be a matter of just being able to grab a can of cheese from your local grocer and insert it into the machine like an ink cartridge.