With Best Buy and Target promising price-match guarantees against online competition, and Amazon.com (NASDAQ:AMZN) now collecting sales taxes in more states, "showrooming" might officially be over.

At the same time, eBay (NASDAQ:EBAY) and Wal-Mart (NYSE:WMT) are testing out innovative new delivery options in their fight against Amazon. The Motley Fool's Alison Southwick asks contributor Demitrios Kalogeropoulos for his thoughts on the brewing same-day-delivery battle, and on which companies seem best positioned to deliver the goods.

Fool contributor Demitrios Kalogeropoulos has no position in any stocks mentioned. The Motley Fool recommends Amazon.com and eBay. The Motley Fool owns shares of Amazon.com and eBay. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.