Comment by CitizenKane

This is already happening in China. Because of the nature of shipping companies here it's not unusual to buy a product (typically off of http://taobao.com) and get it later that day or the next day. Many of these businesses are based in Shanghai and if you live there delivery happens nearly instantly. One online shop, http://cheers-in.com/ delivers cold beer in Shanghai in 1 - 2 hours from an order. Stuff like this is absolutely fantastic and it would be amazing to see it come to the US.