South Florida’s commercial and residential real estate markets remain hot for international investors as well as for homeowners moving from suburbs to downtown cores, panels of industry leaders said Thursday at the Perez Art Museum Miami. About 200 people attended the third annual University of Miami Real Estate Impact Conference, which included a keynote session from Starwood Capital Group CEO Barry Sternlicht and was moderated by UM President Donna E. Shalala. When Shalala asked him about the Miami market, Sternlicht cited hotel-room rates and occupancies that lead the country as well as big-draw events like this week’s Miami International Boat Show and next week’s South Beach Wine and Food Festival as reasons he’s “extremely bullish