Actually, given the additional delays for security, trips under ~ 250 miles, buses and trains are a viable alternative. I'd suspect that those routes are rapidly becoming more profitable for ground transport. Maybe that can help with investment in high speed trains.
The TSA Radius is the distance below which you'd rather drive than fly. (I invented this term, but feel free to use it.) As far as I'm concerned, they've just increased the TSA Radius to infinity.
