Hey Xing, to get back on track you should follow the St. Louis construction thread for the latest updates.
-The Mayfair is undergoing a $15-million renovation. It will become a Magnolia Hotel - a boutique brand based out of Denver. They have hotels in Dallas, Houston, Denver, Omaha etc.
-The Renaissance Suites is about to undergo a $15-million renovation into a Marriott Courtyard.
-The LaClede's Landing historic cobblestones are being removed then put back into place after a resurfacing/re-evening project. The district is making the cobblestones more compact as separation between them has occurred over the years. See video
here.
-The Roberts Tower, as mentioned already, is undergoing a build out of 132 luxury-units. It is scheduled to open in the early summer 2014.
(Source)
-The Mosiac restaurant closed all locations - not just downtown. Restaurants and businesses tend to come and go. There are a lot of new establishments downtown. Flying Saucer Draft Emporium beer hall, St. Louis Cinemas, Robust wine bar, the new Alpha Brewing Company, etc. etc. More restaurant and entertainment options are planned with Phase I of Ballpark Village nearing completion.
-Roberts Orpheum Theater is slated for a renovation by the same Chicago build-out developers of Roberts Tower.
-The Dorsa lost a ground floor tenant, I believe, but residential lofts remain.