KNCMiner Neptune 20nm: will offer 0.7 watts per GH/sec.   http://www.coindesk.com/kncminer-pre-orders-next-asic/

Actm 28nm: Estimated Chip Power Consumption: 11.136 Watts (~0.696 Watts per GH/s).   https://bitcointalk.org/index.php?topic=158806.msg2598150#msg2598150


Seems like the competition isn't really that competitive.