At current rates of price deflation, one might expect global Internet bandwidth to drop two orders of magnitude by about 2022. That is important because prices for using a gigabyte of mobile data might then be about $1 per gigabyte, a level many believe will be necessary to support mass adoption and use of Internet apps.
In 2030, at current rates of price deflation, a gigabyte consumed should cost about seven cents a gigabyte.
Some believe it will take costs about a tenth of a cent per megabyte, or about $1 per gigabyte, before widespread Internet usage will occur in many parts of the developing world.
Mary Meeker's "Internet Trends" presentation