Untangling ultrawideband describes a technology that could make even video cables unnecessary:
The two incarnations of UWB are variations on the same highly unusual technological theme. Unlike conventional radio transmitters, which transmit on a particular frequency and which cannot be picked up if the receiver is slightly mistuned, UWB devices broadcast at very low power over an extremely wide band of frequencies. This has the advantage that UWB signals can be picked up by suitably designed receivers, but resemble background noise to conventional radio receivers, which are listening on one particular frequency. Conventional and UWB radios can therefore coexist. And that is why America’s telecoms regulator, the Federal Communications Commission (FCC), ruled in February 2002 that UWB devices could operate across a broad swathe of the radio spectrum, from 3.1GHz to 10.6GHz, without requiring spectrum licences.