Bloomberg has reported that online retail giant Amazon has plans to open as many as 1,500 delivery hubs in American cities and suburbs.

The move marks a sharp turn in strategy for Amazon, whose warehouses have typically existed on the outskirts of exurban areas. But now that Walmart and Target are offering same-day delivery from their urban and suburban locations, Amazon’s once revolutionary two-day delivery guarantee has the company trailing its two distinctly uncool competitors.

Some commentators are speculating that failing or closed malls could be converted to Amazon DCs since they are often situated in suburbs with good transport links.