Blu-ray’s victory in the home video format war appeared complete after Wal-Mart, the world’s largest retailer, said on Friday that it would commit itself exclusively to the Sony product and no longer stock Toshiba’s rival HD-DVD.

Wal-Mart, which has long reigned as the biggest seller of DVDs, said its decision to carry only Blu-ray discs and players was a response to customer preference. It follows similar moves by other large retailers, including Target, Best Buy, Netflix and Blockbuster.