From ZDNet: Because each node on a mesh network only has to make contact with its immediate neighbor and not a distant base station, it can transmit at a very low power; frequencies used by one node can be reused by another only a short distance away. “The physics of wireless networks means that nodes close to each other can operate at much higher speeds, all else being equal,” said Witteman. Mesh networks are also inherently robust, as new routes can be found if any one node goes down. There isn’t normally just one point of failure.
From the BBC: If the research proves fruitful, homes could soon be studded with small, smart wireless relays that shuffle data around at very high speeds.[Smart Mobs]