Hamish McKenzie writes at PandoDaily:
Given its young demographics, its location-responsive functionality, its ability to exploit the power of its host devices, various revenue options, and its personal quality, mobile chat makes email look staid and inflexible. Those factors won’t be enough to kill email. Indeed, as a delivery mechanism for in-depth written interactions, it’s hard to imagine what could beat email. But when it comes to online communications, mobile chat’s advantages are perhaps significant enough to one day thrust email into second place.