They now send out a small pulse a few times a second, and then watch the decay on their own antenna.
A change in the decay rate means another resonant antenna is nearby and stealing its energy - so then they power up fully to check things out.
Apple always says stuff like that until they're ready to unveil what they've been working on.
Bigger screens, Hi-Def displays, etc. - all right out of the same playbook. You can't trust exactly what they say, because they have their own agenda.
