With 5G it is possible to do enormous amounts of computing at very high speeds and without having to connect the input device—a cell phone, say, or a self-driving car—to a wire of any kind. But those high speeds are possible only if the rest of the system (signal towers, base stations, distributed servers, and the megascale centers that house the data and do a great deal of computing themselves) is physically near enough to these input devices.

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