One of the biggest disruptors of the last few years has been the distributed nature of work. People can now work pretty much anywhere, anytime, with anyone, on any content. And though content still plays a critical part, I am starting to see context as more critical for any type of collaboration. Without a common context it is hard for two or more people to work together.
Tools like email can work for one to many interactions (if you cc the whole organization), but not many to many. Web conferencing also falls under the one to many umbrella. And though a common context is required in those instances, they do not require the deeper knowledge of context that many to many interactions do, as we see in distributed teams.