Can CIOs move completely off the Microsoft stack or will SI vested interests make it difficult?

I was having a conversation with an IT supplier last week about the cloud and how it was changing and it appears CIOs are asking: where does Microsoft play these days?

It is being attacked from all angles from the industry. Exchange is being challenged by the likes of Google, SQL server has its niche but is there much opportunity to grow, SharePoint is being challenged by cloud suppliers such as Huddle and Windows and Microsoft Office have lower cost alternatives.

The supplier said to me that there are plans within Enterprises to move off Microsoft completely. “Where does Microsoft fit? Many CTO’s that we have spoken to want to move entirely off the Microsoft stack within years.”

How realistic is this? And will SIs, that benefit from big Microsoft enterprise deals, allow this to happen?

Are you planning on reducing your use of Microsoft products?