From my brief read of the cover of the Canberra "Sunday Times" as I walked out of the supermarket with my groceries, the Canberra Airport is the main supporter of this project so far.
For those who haven't looked recently, Canberra Airport has expanded the commercial activities and related business office parks to the extent that it is now harder to get to Canberra Airport at 0800 than to to Sydney Airport.
If a rail line was extended to Civic some of it would have to be underground in some areas since there is very little space available. This is particularly so between Russell and Duntroon where the road occupies all the space between cliffs and the river. However, there would possibly be a market for a shuttle service with Metro type cars since the road network can't cope.
I could walk to the airport from home in the morning as quickly as I can drive and I don't live within sight of the airport.
But even the big organisations backing the previous bids didn't put as much effort into the VFT and Speedrail as might have been thought.
I think it was Speedrail (but it might have been VFT) needed a model train for a photo opportunity with thev ACT Chief Minister, and they had to borrow my Lima HO TGV Atlantique. At least I got it back!
You'd think they would at least have a model of the proposed train handy for such occasions. I know there is a model "Speedrail" set now, because I've seen it.
But the real justification for a fast train could be reducing the number of Canberra Sydney (and v/v) flights to provide more slots at the Sydney end.
It would allow Countrylink to stop their present Canberra service, since arrangements could be made for concession fares on the new trains.
By the way, VFT is just a translation of TGV from French. Nobody thought it up as an original name.