About a month ago, I went to SharePoint Saturday in NYC. It was an amazing event, located at Microsoft's Times Square HQ.
While there, I attended many seminar sessions, and one that really resonated with me was Ryan Schouten's "What is Office 365, and Why Should I Care?" During his presentation, Mr. Schouten covered the Cloud's functionality in 365,the challenges surrounding the Cloud's maturity, a brief history of Office, included services, additional benefits, and of course, why anyone should care about it.
To view the full PowerPoint presentation, and I highly recommend it, you can download it by clicking HERE.