Why has there never been anything built on the corner of 100 S. and Main St.?

It's ridiculous the amount of large parking lots there are in downtown SLC taking up prime real estate.
I am so sick of that tiny looking Zions Bank building and parking lot taking up that great location. In a few years that area is going to be awesome with the addition of the PAC and with CCC already across the street. Is Zions Bank asking too much for a developer to buy it? Adding something there would help the density of that area so much.
I would love to see a Neiman Marcus or a Saks Fifth Avenue located there.