Last time the powers that be decided to improve internet access for my area we got moved off a cabinet that was 3km away and onto the central Palmerston North cabinet which is 8km away. So, I'm not going to get excited about the UFB roll-out just yet.
Distance effectively doesn't matter with fibre optics compared to copper, so I would be looking forward to it in your situation.
Except that 8km would be close to the limit for GPON on a 24way split. I doubt 8km from central palmy is included in the UFB contract, but at best would be close to the edge of coverage. They may find a way to get the "exchange" closer to you if there is population growth in the area, although Palmy didnt seem to be growing too much while I was there at Christmas.