In 5-10 years, we might see DSL and Cable being replaced by internet through mobile networks - current ones are Verizon/T-Mobile/ATT/Boost/Virgin Mobile.
While this approach would work well for remote locations, it is not practical for areas already covered with cell phone signal and towers (most of the urban areas in the world). The most practical solution is to deliver internet through the same networks our cell phones currently use, and, in fact, this is already happening. The issue is that it's just too expensive at the moment, but eventually, very decent internet speeds will be obtained at fairly cheap prices through cell phone networks.
While they would probably never match the speed of a wired signal, not everyone needs that speed, for most people, the speed achieved through cell phone network will be sufficient.
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