It will be interesting to see what the interest level is. We haven't heard what loads are like on the SG flights yet.
Once thing going for Canberra is the potential pax catchment area. I think I read when Ikea were setting p in town that they estimated there was about 800,000 people in and around Canberra that would travel to Canberra for them (anywhere from Albury, Wagga to Southern Highlands) rather than go to Sydney/ Melbourne.
If the price and frequency is right CBR is a much nicer proposition than SYD MEL.