"I have my shopping list on a piece of paper, and cross things out when picked off teh shelf."
Indeed. A decade ago, I had a eeePC in the kitchen so that people could call up recipes, play music, and add to the shipping list. There was a printer on the shelf above to print recipes and shopping lists.
Problem is that no one used it but me, and I didn't use it all that much (and mostly for music)
Nowadays, the eeePC and printer are gone. Recipes are in a notebook and the shopping list is on a notepad hanging on the fridge next to a pencil holder.