Walmart said it plans to generate $9 billion in revenue from ecommerce sales in 2014. One way Walmart expects to reach that revenue goal is by adding a "same-day delivery" capability. Amazon also has said it is looking at next day delivery, or perhaps same-day delivery, in at least some markets.
Walmart is more optimistic than is Amazon. Walmart is testing
same-day delivery in four markets and a scan-and-go smart phone service, which would allow customers to scan purchases with their smart phones and pay for the purchases without getting into a check-out line.