That may happen anyway, in time, if this situation is not fixed, but it could happen so much faster if companies like Google, Microsoft and Facebook (ok, I know I'm really pushing with this one) who have services used by over a billion people would offer very secure end-to-end communications platform, by default, and in a very transparent way (being able to check for sneaky backdoors pre-encryption, or anything like that).
They don't even have to do it for everything, especially the parts which are meant to be more public anyway, but there's absolutely no reason why IM's couldn't be completely private - from everyone and anyone, including the companies themselves.
So what are you waiting for Google, Microsoft and Facebook (and others, too)?