You must be joking... THIS is where we're headed? Somehow, I doubt that Intel and others are too worried about the potential competition. Still, it does cause one pause, and in thinking about it, I can see all sorts of low-end applications that beg for as close to zero power if were possible to achieve. This may help.
One possible advantage would be that this takes us back to the polarity insensitive and bidirictional current flow inherent in a relay. Back when logic was routinely made from relays, those attributes were routinely taken advantage of to create systems that weren't strictly boolean in nature. The result was fewer relays (and lower power consumption).