I think they are purposely segmenting the population here to show how typical supermarkets (read: Food only) are fading precisely because other retailers (walma

I think they are purposely segmenting the population here to show how typical supermarkets (read: Food only) are fading precisely because other retailers (walmart, etc) have gotten into the food game. Walmart isn't a supermarket because it's got a lot more than food. Its goods are a superset of your typical Giant, Kroger, Ralph's, etc. This is also likely a reason you see Kroger start to expand into "Super stores" that have one-stop shopping for a lot of similar things.