I know that here at AU and elsewhere, there has been much support for more high-speed rail service provided by Amtrak. Which involves, among other things, getting support from Amtrak itself, as well as trying to persuade the host railroads to upgrade their infrastructures to accommodate it.
Here's what I think:
We should have a healthy combination of conventional and HS rail service. Because some people take the train to enjoy the scenery around them, while others want to take it to get to where they're going (this is kind of where the Acela comes in). I think Amtrak could benefit from more high-speed rail service, but I want the conventional trains to remain also. Some people look to Europe's and Asia's HS trains and say "Amtrak should be like this". But it's kinda hard to take in the scenery when it's whizzing by you.
I know that it won't happen overnight even if everyone's "on-board" (pun intended), but it's my take on it.