The latest Walmart app update on Android (and soon on iOS) enables users to search for products available in-store (in addition to walmart.com website) with the new "at your store" search results page.
Here's how Walmart describes the feature: "Now when you search for an item we’ll tell you if it's currently in stock at the store of your choice--we'll even tell you its aisle location in that store. If it’s not in stock, the Walmart app makes it easy to find that same item at a nearby store or on Walmart.com." Note that each item shows the aisle # the product is located in.
IndoorLBS speculates Walmart is getting the app ready for Black Friday to enable a less stressful shopping experience with real-time inventory, etc. In previous years, the Walmart app featured a specific Store map with Black Friday deals shown on the map to help shoppers find the items.