I feel like the existence of High Speed Rail elsewhere is hurting our progress in the U.S. at this point. Rather than making realistic plans to add service, governments would rather spend tax money on paper studies of some 200 mph train that has zero chance of being built. High Speed Rail supposedly makes 79-mph service obsolete, but it doesn't exist in our country, it's just a straw man that's used as an excuse to do nothing.
I really wish people would stop talking about "200 mph trains" and "79 mph trains." The speedometer on my car tops at 140 mph, which suggests that I could drive it that fast, but, in reality, I've never ever done so. Aside from the fact I'd get the mother of all speeding tickets, I don't think there's a single road in this country outside of a NASCAR track that's engineered to allow driving that fast. And even on journeys that are mostly on roads with speed limits of 60-70 mph, I consider myself lucky if my average point to point speed is 50 mph.
The Acela is supposed to be a "135 mph" train between Washington and New York. Actually, the end-to-end average speed is more like 80 mph, which is pretty respectable. Between New York and Boston, it's supposed to be a "150 mph train," but the end-to-end average speed is closer to 70 mph (thanks to the State of Connecticut and Metro-North).
I don't have the performance figures of the Euro and Asian HSRs off the top of my head, but I think that a lot of those "200 mph trains" actually have end-to-send speeds more like 100 mph. That's faster than the Acela, and being able to do that consistently would cut the Washington-New York travel time by 30 minutes, which would make it even more competitive speed-wise with flying. However, even under the current schedule, Amtrak service (including the Northeast Regionals) competes very well with flying. Actually, the current performance is pretty impressive, considering that the trains run on aging infrastructure, some of which was built right after the Civil War.
Rail advocates and politicians should stop yapping about the potential top speed of the trains, which might only occur on a few miles of the route, and focus on total travel time or point-to-point average speed and the frequency of service. That's what makes a train service convenient and competitive.