exactly ...

 " Each Neptune miner will consist of 5 ASIC chips and comes in new sturdier enclosure and packaging and should be capable of 3 THS or even more while consuming about 2.1 KW of power at the wall. That results out to just about 0.7 watts of power used per GHS, so really god power efficiency and KnC does promise to possibly further increase the performance of the device with software updates."

we'll see about their (KnC's) predictions ... that is w/o doing something awesome (and costly) as data-tank cooling.