The issue with the HSR in Ohio was that they planned to buy land for the stations where land is cheap. Sounds good to accountants, but the problem comes from actual implementation--the land is cheap because no one wants to be there. It was far from anything anyone had any business going to. Which means that in addition to the cost of a train ticket, you would have to shell out funds for a taxi ticket (not something there are a lot of in Columbus, Ohio, at least not in the parts they were going to put stations in). If you had to transport....well, anything, this becomes a HUGE pain in the neck. It also becomes a scheduling nightmare, because you have to factor drive time into it. You also have to factor parking into the cost--you've got to get to the HSR station somehow, meaning either someone drops you off, you take a cab, or you drive and park your vehicle (more expense).
Oh, and there were issues regarding right of way for the train, which made it slower than driving. Going from Cincinatti to Columbus would take about an hour to an hour and a half longer by HSR than by car. On a good day.
My dad (civil engineer) was in a meeting where all of this was discussed, and I got my inforamtion from talking to him and my grandfather (another civil engineer). He was making fun of me, because I was working on the CA HSR at the time. But that's the mentality of the people pushing this system: they simply are not looking at the real-world applications of it, and instead are trying to make reality comform to their wishful thinking.
As for the CA HSR.....I'll just say that the blind leading the blind would be orders of magnitude more efficient and leave it at that.
If you want to build an effective HSR system, you need to look at what routes get the most travel. Put a station on one end of the route, and a station on the other. Have it go from one station to the other as fast as possible, on a dedicated line that does not interfere with other transportation systems. Have the stations be close enough to the people that they can get from the stations to their destination reasonably quickly, or have a shuttle system integrated into the HSR system to compensate for the distance. Maybe something like, you can add being picked up by the HSR shuttle for a fee when you buy your ticket. An HSR line from New York to DC would be fantastic. An HSR line from San Diego to LA to Sacramento would be a fairly good thing. But in most places the inconvenience of public transit overwhelms any other benefits--traveling by car is the most time- and cost-effective way to get around.