don't expect internet speeds to increase by very much in the near future... 99% of households aren't going to want to upgrade the physical wiring into their home for a connection faster than dsl/cable. DSL really is running as fast as it will ever get because traditionaly phone line cannot handle much higher bandwidth than it allready is. Don't expect cable to go much higher.
But yeah, eventually it will happen. If anything, it will probobly happen wirelessly, when cellphones upgrade to the point that the cellular signal can transfer data so quick, people use those signals for internet traffic, Sprint has offered this service for a while
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