American supermarkets are all about making meals more convenient. I've seen jars of mixed peanut butter and jelly; with one of those, a PBJ sandwich should take half as long to make. More recently, I saw the equivalent for another sandwich staple: ham and cheese. It's a cube of processed, sliced ham like one would usually see, but nuggets of swiss cheese are insinuated throughout the loaf. What a great idea.
Where does food convenience go from here? I would be happy with a hotdog sausage engineered to have ketchup, mustard, and relish in its core. As things currently stand, I like hotdogs but they're more difficult to eat than I would like.