Visual Studio Online is a great place for project collaboration. Any plans to support an online IDE, such as the full fledged Visual Studio itself?
I can't predict the future, but there isn't anything beyond the "Monaco" online editor happening in the near term. Speaking from my own personal experience I will always prefer a desktop IDE over a web-based experience. It works offline, and it's much faster than dealing with network latency for every UI action. A good analogy here is Outlook. It's amazing what the engineering team has done to make Outlook Web Access a viable web-based email tool, but it is no substitute for the full power of the desktop client.