Amazon Web Services could be worth $600 billion by itself. Here's why Wall Street analysts think a spinoff won't happen any time soon. (AMZN, MSFT, GOOGL, GOOG)

Amazon is going to spin off Amazon Web Services (AWS), its market-leading cloud-computing unit, as a separate company, marketing guru Scott Galloway predicted recently at Business Insider's IGNITION conference.
Galloway, who correctly predicted the company's acquisition of Whole Foods, thinks the spinoff of Amazon Web Services will happen in the next two years.
Many of the financial analysts who cover the company agree that it's likely to happen — but most don't think it will occur any tim