While I do believe at this point in time it is a literal pipe dream for bigger countries in the world, for example the US, because it would be too expensive to create without government aid. There may be a future where it is possibly subsidized, not cross country, but from major lines like boston to dc, hitting all the main cities on the way down. 

>Besides, it would literally be a vomit inducing shuttle. People spewing and passing out left right and centre!

Its design is developed to counteract this just like  bullet speed trains or airplanes.

If it was up to the government, I'd certainly agree. I'm hopeful that a private company would be much more efficient. Australians have never been technological pioneers, so it would probably need to be built in the US or perhaps Dubai first before we catch on. 

I though it was ridiculous that [this company](http://www.news.com.au/travel/travel-updates/new-high-speed-rail-plan-connecting-sydney-to-melbourne-revealed/news-story/f8a68ac334a6dea57b96db28b3bf6534) announced their high speed rail plans for Australia without a single mention of future technologies.