In Africa, Bitpesa is doing a great job of commerce over sms[1]. A third of Kenya's GDP flows through Bitpesa[2]. With people more people having access to a cell phone than proper sanitation[3]; commerce over text will increase faster in the developing world than in the west. It is definitely a trend to keep an eye on.
1. https://www.bitpesa.co/
2. http://finance.yahoo.com/news/31-kenya-gdp-spent-mobile-1759...
3. http://www.usnews.com/news/blogs/data-mine/2014/11/18/on-un-...