At the moment, this capacitive coupling, as it is called, is able to transmit data at a rate of 3 gigabits a second.

ECONOMIST: Data-storage systems

The "killer applications" of speedy networks (which theoretically can transmit data at 40 times the rate of conventional cellular systems) have been widely touted to be portable videophones, plus access to Internet-based broadband content: games, music and shopping.

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