Obviously Main Street is and always will be the heart of the city, but I would envision that as the city continues to mature that the skyscrapers will move out from Main Street. I still think that a new tallest will be built somewhere along 100 S and or Main (hopefully on the empty surface lots), this would definetly help to fill in the gap in the skyline from the western view.
Once we have that hole in the skyline filled, I would like to see the skyline extend further south and east to west. It would be great to have a wider skyline as you approach the city from the south on I-15. For instance a new skyscraper on State and 400 S, the Cowboy Partners building on State and 100 S, and the WTC on 200 S and State, all would do wonders to not only fill in the density from the east and west view but to expand the skyline from the southern view.
So here's my wish list. The new CCC towers (32, 20, and 19 stories), 222 S Main(22 or whatever it is), I'm going to call it the 'Arts District Tower' on the surface lots behind Zions (hopefully 40+ stories), Cowboy Partners (35-40+), WTC (35-40+), State and 400 S, I'm going to call it City Center II (and hope for 45+). Hell I'll even suggest a new Sinclair Tower Earl Holdings 400 S parking lot, lets say another (35+). That's my wish list for the next 10-15 years.
As for the new vs restored historic theater. I was at an event on Saturday at a beautiful restored theater in the heart of downtown, and my date commented how much more enhanced of an experience it is to attend such an event at a historic theater as opposed to a new theater of comparable size in another city in which she had attended several shows. Or maybe it was just the company that she was with that made it more enjoyable.