Personally I'd love to see a high speed train network in Australia. It dosn't look likely at the moment but if It does happen I bet that the trains will not look like this.
This really has to be one Ugly, and wowfully inpractical designs I have ever seen for an inter city train. First of all why all the curved window frames, it doesn't look that good, all it will do is increast the cost of manufacture and wastage beause all the windows have to be custom cut into funny shapes.
But my biggest gripe is there proposed seating where 1/4 of the seats have no backrest and more then half of them don't face the direction of travel. And really on A trip of several hours I expect to be able to sit facing forwards. (Due to a propensity to motion sickness the alternative is not an option). But then again suppose that in the real world economic factors will nix that idea quite effectively. Seriously what operator is going to put that crap in when they could put twice as many regular seats in the same space?
In any case building the train is not the economic hurdle. Building the track is the economic and engineering challenge. Find a way to do that faster and cheaper then conventional steel track and then you'll have something noteworthy. And the real challenge in a country where the hottest summer days every year are sufficient to cause track buckling. Really solve the hard challange first and leave the interior design for later.