I think most of the people commented here don't live in US. Let's just put it this way, I've yet to meet a single American who thinks US needs 高铁. I for one will NOT vote for building 高铁. The price tag is not worth the benefit.
The reason I like America is it is very different from China, and I'll do everything I can to keep it that way.
Fist, the Chinese way of spending money doesn't work else where, especially in US. And that is the reason China will never be able to join the developed world like Japan.
Second, there are lots of interesting technologies out there, 高铁 is just one of them. What is more important is what the technology can do at what cost. 高铁's cost is too high for most of the countries the world therefore it won't fly.
Best of luck for China to sell its 高铁. Maybe the Chinese dream is chasing the unattainable.