The Regent Hotel is on track to break ground later this year.
Additional Projects coming soon are:
Patrinely Buildings (Phase1) - 6th South and Main Street
4th South and West Temple - 2 towers (18 Story Hotel+Residential and 15 Story Commercial)
A little smaller but still making an impact:
3rd West and 350 South residential building at 8 Stories.
The Morton (
http://www.buildingsaltlake.com/construction-starts-downtown-apartments/) is also under construction now. 8 Story residential building.
2nd West and 2nd South - 8 Story Hotel
There is also the 1st South 3rd West, Hotel and Residential Towers 8-12 stories. May happen break ground this year but more likely next year.
Outside of those, the next on the list are (in no particular order):
151
Cascade
1st South & State (CCC Commercial Tower)
1st South and 2nd East (CCC Residential Tower (10 to 15 stories)
CCH
I think this is a list of the current and planned 8 stories or higher buildings in and directly adjacent to the CBD.
Time will tell how soon the projects happen.