Re: Communication, Communication, Communication
Telcos crapping in their pants? I highly doubt it. To get any of these you still need a data plan of some sort or permanent access to WiFi and you have to be sure that the person you want to talk to has the same. The majority still charge outrageous amounts for data and unless (until?) something like WhatsCrap and data plans are part of every single phone sold they will never replace the utility of SMS.
SMS - they may be short, they may be relatively useless for expressing yourself but they're still part of practically every mobile phone sold on the planet. Suddenly 310 million users doesn't seem that many.