A few days ago, AT&T CEO Randall Stephenson revealed that the cellular industry would be moving towards data-only plans in the next few years, rather than the separated voice, message, and data system that is used today. Under the new system, voice and messages would be billed as data. The question, obviously, is at what rate they'd billed.
Initially, this may seem like a great idea for both parties. Obviously it allows carriers to get a handle on all the services their customers are using (such as Skype for calls rather than normal voice), as well as sneak in some "toll-free" data services.