"Amazon Web Services remains the biggest of the big cloud providers, but it’s seeing competitors gaining in its rear-view mirror. Nomura Securities analyst Rick Sherlund now expects Microsoft to field the largest cloud business by December — at least in terms of annual revenue run rate which he estimated will be $5.77 billion"
This week, Deutsche Bank estimated that AWS sales could reach $16.2 billion by the end of 2017. That would make AWS worth $160 billion"