Ragnor: Unfortunately in NZ prices are going to be nearer $100 NZD /month still most likely.
The retail ISP's will be paying ~$37.50 / month / customer at least ($37.50 for 30/10... higher for 100/50 or 100/100) to the regional fibre company for use of the wholesale GPON bitstream 2 service which just gets data from the premises to a handover point.
Tthere are the other UFB related ISP costs too, eg: co-location, handover connections, domestic backhaul/transit. Plus all the ISP's other costs eg: staff, marketing, equipment, international bandwidth etc.
We have not seen any residential UFB based plans advertised yet other than Northland ISP ubergroup, who have 50/50 Mbit w/ 150GB data cap for $99 (they must be using the 100/50 bitstream but limiting to only 50/50 in their network)
The "wholesale" reference service descriptions and price lists are on the Crown Fibre website
XNET has been offering retail UFB with 30/5 for 99 without any data ($1.28 per GB) for over 1 year now
http://www.xnet.co.nz/solutions/fusion-over-fibre, that includes the VOIP line and free 1k minutes to about 6 international countries.