It should also be noted Poydras Street and most of the office towers along Poydras were built after the Dome was situated on the land it occupies. The Dome changed New Orleans and created an economic boom downtown.
It was high oil prices in the 1970s that did the most booming for downtown NOLA, but having the Superdome anchor a recently-widened Poydras St. probably helped cement it as CBD's high-rise corridor.
Much to the chagrin of whoever thought building Plaza Tower at Loyola and Howard was a good idea.