Text Messaging Declines in U.S. for First Time, Report Says - NYTimes.com

I expect this trend (a decline in text messaging from wireless service providers) is likely to accelerate, e.g., as Facebook continues to get its mobile act together, more people use Apple iMessage, and Microsoft seeks to leverage Skype

"Though that’s a small dip, the change is noteworthy because for several years, text messaging had been steadily growing in the United States. Mr. Sharma said it was too early to tell whether the decline here would continue, but he noted that Internet-based messaging services, like Facebook messaging and Apple’s iMessage, had been chomping away at SMS usage. He said the decline would become more pronounced as more people buy smartphones. A bit more than 50 percent of cellphone owners here have smartphones."

Text Messaging Declines in U.S. for First Time, Report Says - NYTimes.com