The problem with "doing without" is selling it.  IMHO, parking your Volt and VentureOne at your Passivehaus is a much more attractive vision than wearing heavy sweaters indoors all winter.  And for the moment, at least, we can build the Passivehausen.

Part of doing with less is having a Prius, which cuts gas use by 60% over the average vehicle. This is hardly wearing sweaters indoors all winter. While visions of future technology may be a good selling point, they divert us from what should be done now with existing technology. GM will milk the ICE installed in the big SUV or truck as long as possible. We don't have time to wait for the Volt; besides I don't think it makes sense to trust Lutz as far as we can throw him. I am would like to throw him.

Part of doing with less is better and more insulation and building and retrofiting houses now to use less energy. This has nothing to do with heavy sweaters, in winter, either.

I didn't mean doing without energy; I meant doing with less.