It's a socio-economic phenomena called a pardijm shift, where goods and / or services, or basically any long established pattern of doing things a certain way meets its demise---usually with some type of prior warning, but not always. Some good examples of this are:
Digital watches replacing hard ware mechanical watches. Smart phones replacing all watches. Internet replacing printed word. Printed words replacing cursice writing
......On line shopping replacing brick-and-mortar stores. And like all the above prior mentioned examples, Walmart Super Centers won't disappear completely----but we'll N E V E R see them return to 2005 status, either.