I'd like to see a revival of trains in the US, but I agree their impacts will be limited. I think they make sense for regional travel (Texas triangle, New England area, West coast, Midwest, maybe NM/Colorado/South Wyoming, etc.) Hopping between these regions seem like planes are the obvious choice. The distances are just so high, with often very limited regional centers connecting them in between.

I'd love to take some HSR to Austin or Houston or San Antonio from DFW, but I just can't imagine the network to make a train work competitively to get from DFW to NYC or LAX.