Email will be Outdated for Businesses within 5 Years

In the next 5 years, what piece of technology do you think will be totally outdated for businesses to be using and why?

I think email is the single biggest time waster in companies today. There has been much innovation to make email more efficient, however I believe that email is broken at its core. It just simply is not a productivity tool and I’m willing to bet that within 5 years it will be phased out for another tool or technology that provides the same level of communication in a more efficient manner.