I've always envisioned this type of utopia to be robot based, with a few machines thrown in for sure. I've thought if you can robots plant, grow and harvest the raw food. Then have autonomous trucks drive that food to processing plants that then have robots and machines processing it. You then again have autonomous trucks drive it to the grocery "store" that then have robots placing the product you could in theory make all food free*. (add a billion asterisks to that last statement) Making the food free would probably require the entire economy to migrate to robot workers as much as possible or at least have it be where the robots make other robots so at least they are low cost/free to make. It'll never happen, we're totally destined for a Cyberpunk future instead of Star Trek future, but it's at least fun to think about.