its all about efficiency 100% and secondly the size/noise of machine (home miner here)
an option at 100W/500-1000W and 3000-5000W that can achieve 15J/TH is what we need, make it happen!
I second that, for home mining, 3kW+ is just mental. The ring mains here in the UK won't be able to handle the current - not to mention the cost of electric at the end of the month would just be insane.
An option for 500W would be a sweet spot IMHO.