From the press release it sounds like retrofitting FIBREOP in an existing MDU requires a lot of cooperation from the building management. I would guess there are a lot of legal and regulatory issues, like ownership of the fibre-optic infrastructure and third-party access.
Since Killam has done this one, they are probably open to doing more in the future. I don't know if this building was a special case because of the fire damage. From what I've heard, Killam is a major property manager in Atlantic Canada.