I thought about such a thing a few years ago. Perhaps the people who can appropriate the money will implement it. "One day, you could board a fast train in Atlanta and get off in Washington, D.C. (and ultimately Boston.) How’s that sound?"
The project is still in the early talking stage, and it's been some years since anybody talked about the Chicago to the Quad Cities train that would diverge from the Way of the Zephyrs near Wyanet, and I have yet to see any connecting track built.