Edit: I was waiting until the R4 became available about 5 minutes ago...and holy crap! 8.6TH for $1395 USD! 
I'm putting my KeepKey back in the safe...
I'm putting my KeepKey back in the safe...You too can buy 66.7% of the hash rate for 87.2% of the price.
Or not!Comparing R4 to S9 - I assume they are truly trying to hit the home market that can't support an S9.