the difficulty with high speed rail is that it will require trillions of dollars to develop - much like the interstate highway system. Early interstates were developed in corridors which had a need for high speed connectivity, not simply to connect one big city to another. There was a method to the madness, so to speak.
High Speed Rail will play out the same way, employing public, private, or PPP funding.
Locally, Harrisburg to Philly has the ridership to cultivate the corridor and achieve higher speeds through the existing corridor. For many reasons - that the $750k was to study - Pittsburgh to Harrisburg doesn't have the ridership.
Nationally, Pittsburgh will be a spur line to any build out of high speed rail. We don't have economic, political or financial wherewithal to begin high speed rail or even produce a "hub."
Cleveland will most likely be the hub for Buffalo/Toronto, Northeast Coastal cities to Chicago and St. Louis; Pittsburgh will not.