The Hong Kong agreement explicitly states that the hard fork code would be ready within 3 months of Segwit's release, something that has not happened yet. The miners agreed that they would run Segwit in production in the meantime. IT DOES NOT SAY THAT BOTH A HARD FORK AND SEGWIT WOULD BE DELIVERED AT THE SAME TIME.
While your capitalized sentence is correct... it doesn't tell the whole story.
SEGWIT WILL NOT BE
ACTIVATED UNTIL/UNLESS HF CODE FOR A FUTURE (mid-late 2017) HF IS RELEASED IN A CORE BINARY.
So... people should not get too excited about the additional capacity generated by moving signatures to witness
until the HF code is released by core.
Activated Live Segwit and HF (for 2017 activation)
do come together as a package, yet they don't
activate together.