Sadly my reservation did not happen. My wife had 3 friends visiting us and decided to go with the tried and trusted CocoMaya route rather spring a brand new (and untried) restaurant on them.
But yes, Biras new restaurant "Ikigai" is officially open! (at least partially).
Their 'terrace' menu is officially open, and the $200/head, 14 course, Omakase restaurant is supposed to open in the next 2 weeks.
I attached some photos and the daily terrace menu here from some friends who went 2 days ago