Actually, Bitmain is planning to release a miner that will make home mining profitable again due to its low power consumption. Let's just keep our fingers crossed and hope they deliver as promised - it's called the R4.
Well, it looks like we can put this to rest. The R4 as I read on the Bitmain website priced at $1395 for 8.6 TH. Compared to the 11.85TH S9, it's hugely "over-priced" on a USD/TH basis. As I first mentioned, it should be way more friendly to run in your home, and you pay a pretty penny for that convenience. Add at least 2 months to the time it takes for you to "break even" in terms of you mining adventure.
The R4 is clearly designed to maximize Bitmain's profit, until they have some competition.I think both the R4 and the S9 lines have plenty of profit, so that the price can be reduced when Bitmain needs to.