It's too bad that the route of the Desert Wind doesn't more closely follow the I-15 corridor. If it went through St. George and Cedar City, I think that it would indeed be a successful route. If you've spent time living in northern Utah, you know that everyone who lives there travels to Cedar City, St. George, Vegas and SoCal for visiting family and pleasure trips. When my mom's parents were still alive and living in St. George, she would have loved to hop on a train as opposed to making that 5 hour drive all the time.
As for me, I would love to see the Desert Wind resurrected if it meant I could ride it to Caliente and see that gorgeous train station.