Earlier quoted context omitted.
why ? viber and whatsapp are still there and will be in the future, i dont see new room for a messaging app.
Some years ago the dominant messaging apps were icq and aol messenger and msn messenger. I think almost every new generation just uses their own messenger.
If you can send from Whatsapp to FB messenger, Viber, Skype and whatever - and vice versa - that's surely going to democratise messaging?