Amazon at 20: what has the online giant ever done for retail?

You may not have noticed but Amazon recently celebrated it's 20th birthday. You may or not be a regular user (I certainly am). It was originally billed a the “Earth’s Biggest Bookstore” featuring over one million titles. Twenty years later it has over 270m active accounts and claims to have more than 2m third-party vendors selling millions of products through its marketplace platform. Amazon is comfortable with the term "disruptive." It's disrupted the bookshop and publishing industries and is disrupting other retail industries. The Guardian recently published an interesting article about the impact Amazon has had - recommended.