Walmart has a long history of embracing change. And this year, it will certainly make some changes to improve its business. These changes will be made with a filter on increasing customer relevance. That was how Doug McMillon, Wal-Mart Stores' new CEO, introduced his plans for 2014 in a prerecorded call on Thursday. There was one bright spot: Wal-Mart's smaller stores. Bill Simon, the head of the retailer's US operations, noted that the smaller locations had positive comparable sales growth and increases in traffic each quarter of 2013.