^ Absolutely, Imagine 15min frequencies and what that would do to travel times between Downtown and Sugarhouse.
Expanding on this pie in the sky idea, what if we had a Frontrunner line serving Morgan county and the Wasatch Back?
This line could start in Brigham City (or, I would prefer Crystal Hot Spring north of Honeyville) and then separate from the main line south of Ogden, following existing right of way through Morgan and Henefer, leave existing ROW at Echo and follow I-80 to US 40 and continue south into Heber. At Heber, the line could utilize the Heber Valley Railroad ROW into Provo Canyon and then could be extended into Orem and Provo. Utah County is where this would get really tricky but perhaps a train box could be created under University Ave or Freedom Blvd. until this line merges with the existing line near Provo station taking it to Payson and Nephi.
This line would probably be very expensive and serve small communities but it would be very scenic, provide access to many Outdoor recreation spots in the Wasatch Back and could become an attraction itself similar to riding the California Zephyr through the Rocky mountains.
This line could feature similar cars with allot of glass for viewing the mountains and shuttle buses could transfer passengers to Snow Basin and Sundance resorts. The line would also directly serve several state parks and reservoirs such as Willard Bay, Echo, possibly Rockport, Jordanelle and Deer Creek and could include a station at Bridal Vail Falls in Provo Canyon.